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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Thank you Craig for this clear diagram which illustrates unambiguously the order of processing. The proposed text will
add a justification to the order of processing. We will discuss this update of the SDLS Green Book at our upcoming meeting. There is a strong push from SLP WG (G.Kazz) to develop that subject in the GB and issue a revision quickly.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Gilles<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D">Gilles MOURY</span><span style="color:#1F497D">
<br>
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D">CNES Toulouse</span><span style="color:#1F497D">
</span><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">De :</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Biggerstaff, Craig (JSC-CD42)[SGT, INC] <craig.biggerstaff@nasa.gov>
<br>
<b>Envoyé :</b> vendredi 7 mai 2021 20:46<br>
<b>À :</b> Ignacio.Aguilar.Sanchez@esa.int<br>
<b>Cc :</b> Moury Gilles <Gilles.Moury@cnes.fr>; sls-sea-dls@mailman.ccsds.org<br>
<b>Objet :</b> RE: [Sls-sea-dls] [EXTERNAL] TR: CCSDS Order of Processing: Figure 6-3 in CCSDS 232.0 and Figure 3-3 in CCSDS 350.5-G<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Ignacio, thanks for your comments. I definitely agree that RF & Modulation should be a separate ‘lane’, and corrected that oversight in the latest
version (attached). At the recommendation of some C&S WG members (whose discussion prompted this diagram in the first place), I also added a legend, a note on BCH ordering, and numbering of sequential flow. I did not incorporate your other suggestions, as
the diagram can’t include much more visual information without losing easy readability.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Craig<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">
<a href="mailto:Ignacio.Aguilar.Sanchez@esa.int">Ignacio.Aguilar.Sanchez@esa.int</a> <<a href="mailto:Ignacio.Aguilar.Sanchez@esa.int">Ignacio.Aguilar.Sanchez@esa.int</a>>
<br>
<b>Sent:</b> Thursday, May 6, 2021 1:46 AM<br>
<b>To:</b> Biggerstaff, Craig (JSC-CD42)[SGT, INC] <<a href="mailto:craig.biggerstaff@nasa.gov">craig.biggerstaff@nasa.gov</a>><br>
<b>Cc:</b> Moury Gilles <<a href="mailto:Gilles.Moury@cnes.fr">Gilles.Moury@cnes.fr</a>>;
<a href="mailto:sls-sea-dls@mailman.ccsds.org">sls-sea-dls@mailman.ccsds.org</a><br>
<b>Subject:</b> Re: [Sls-sea-dls] [EXTERNAL] TR: CCSDS Order of Processing: Figure 6-3 in CCSDS 232.0 and Figure 3-3 in CCSDS 350.5-G<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">I like the drawing, Craig.</span><span lang="EN-US">
<br>
<br>
</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">A few possible improvements suggested:</span><span lang="EN-US">
<br>
<br>
</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">- placement of the Mod and Demod boxes in a new layer above "C&S", which is "RF & Modulation";</span><span lang="EN-US">
<br>
</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">- addition of internal interfaces like the "RF lock" and "Bit Lock" from the Demod box to the CLCW or the control frames towards FARM-1 as directives (not data traffic);</span><span lang="EN-US">
<br>
</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">- addition of text above the solid arrows that directly connect from VC Gen to VC Mux and from VC Demux to VC Rec to explain the perceived absence of COP-1 processing;</span><span lang="EN-US">
<br>
</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">- consideration/illustration of distinct control frame, expedited-service frame and sequence-controlled frame processing (may overlap with the two previous comments);</span><span lang="EN-US">
<br>
</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">- addition of external interfaces (e.g. to the redundant Demod to obtain their "RF Lock" and "Bit Lock", directives to manage FOP-1, Apply Security, FARM-1, Process Security).</span><span lang="EN-US">
<br>
<br>
</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">Let us know if the above helps.</span><span lang="EN-US">
<br>
<br>
</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">Kind regards,</span><span lang="EN-US">
<br>
<br>
</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">Ignacio</span><span lang="EN-US">
<br>
<br>
<img border="0" width="92" height="33" style="width:.9583in;height:.3472in" id="_x0000_i1025" src="cid:image001.gif@01D74528.4ADD3B60">
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</span><b><span lang="EN-US" style="font-size:9.0pt;font-family:NotesEsa;color:#4F4F4F">Ignacio Aguilar Sánchez</span></b><span lang="EN-US">
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</span><span lang="EN-US" style="font-size:9.0pt;font-family:NotesEsa;color:#4F4F4F">Communication Systems Engineer</span><span lang="EN-US">
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</span><span lang="EN-US" style="font-size:9.0pt;font-family:NotesEsa;color:#4F4F4F">Electrical Engineering Department</span><span lang="EN-US">
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</span><span lang="EN-US" style="font-size:9.0pt;font-family:NotesEsa;color:#4F4F4F">European Space Research and Technology Centre<br>
Keplerlaan 1, PO Box 299, 2200 AG Noordwijk, The Netherlands</span><span lang="EN-US">
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</span><span lang="EN-US" style="font-size:9.0pt;font-family:NotesEsa;color:#4F4F4F">Tel. (31) 71 565 5695</span><span lang="EN-US">
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</span><span lang="EN-US" style="font-size:9.0pt;font-family:NotesEsa;color:#4F4F4F">Email:
<a href="mailto:ignacio.aguilar.sanchez@esa.int">ignacio.aguilar.sanchez@esa.int</a><br>
</span><span lang="EN-US"><a href="https://gcc02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.esa.int%2F&data=04%7C01%7Ccraig.biggerstaff%40nasa.gov%7Ca0b54883dbdb4059510a08d9105a9665%7C7005d45845be48ae8140d43da96dd17b%7C0%7C0%7C637558803540802107%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=W8xm55SVMfY8B6yj2pf2yhDcwVkJFK5ODMhVTOoz7xk%3D&reserved=0"><span style="font-size:9.0pt;font-family:NotesEsa">www.esa.int</span></a>
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</span><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#5F5F5F">From: </span><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif">"Biggerstaff, Craig\(JSC-CD42\)\[SGT, INC\] via SLS-SEA-DLS" <<a href="mailto:sls-sea-dls@mailman.ccsds.org">sls-sea-dls@mailman.ccsds.org</a>></span><span lang="EN-US">
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</span><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#5F5F5F">To: </span><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif">"Moury Gilles" <<a href="mailto:Gilles.Moury@cnes.fr">Gilles.Moury@cnes.fr</a>>,
"<a href="mailto:sls-sea-dls@mailman.ccsds.org">sls-sea-dls@mailman.ccsds.org</a>" <<a href="mailto:sls-sea-dls@mailman.ccsds.org">sls-sea-dls@mailman.ccsds.org</a>></span><span lang="EN-US">
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</span><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#5F5F5F">Date: </span><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif">05/05/2021 22:14</span><span lang="EN-US">
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</span><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#5F5F5F">Subject: </span><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif">Re: [Sls-sea-dls] [EXTERNAL] TR: CCSDS Order of Processing: Figure
6-3 in CCSDS 232.0 and Figure 3-3 in CCSDS 350.5-G</span><span lang="EN-US"> <br>
</span><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#5F5F5F">Sent by: </span><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif">"SLS-SEA-DLS" <<a href="mailto:sls-sea-dls-bounces@mailman.ccsds.org">sls-sea-dls-bounces@mailman.ccsds.org</a>></span><span lang="EN-US">
<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="EN-US"><o:p> </o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080">Dear SDLS WG members,</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080">I have lately received a few (internal NASA) questions regarding the order of processing between SDLS and COP, similar to
discussions in the WG earlier. Since we already discussed adding clarifying text in the next SDLS Green Book revision, attached is a diagram I created to illustrate the flow and interactions between protocol sub-layers. If the WG finds this helpful, we could
consider it (or something similar) for inclusion along with the clarifying text.</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080">Best regards,</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Arial",sans-serif;color:#5F5F5F">Craig Biggerstaff</span></b><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Arial",sans-serif;color:#004080"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US"><img border="0" width="86" height="48" style="width:.8958in;height:.5in" id="_x0000_i1027" src="cid:image002.jpg@01D74528.4ADD3B60" alt="KBR - Copy"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#5F5F5F">KBR | Senior Engineer Specialist, Mission Systems Operations Contract</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#5F5F5F">2101 NASA Parkway, Mail Code CD4 | Houston, Texas 77058 | USA</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#5F5F5F">Office: +1 281.483.2027 | </span><span lang="EN-US"><a href="mailto:craig.biggerstaff@nasa.gov"><span style="font-size:9.0pt;font-family:"Arial",sans-serif;color:#0082BF">craig.biggerstaff@nasa.gov</span></a><o:p></o:p></span></p>
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<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:8.0pt;font-family:"Arial",sans-serif;color:#5F5F5F">This e-mail, including any attached files, may contain confidential and privileged information for the sole use of the intended
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<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> SLS-SEA-DLS <<a href="mailto:sls-sea-dls-bounces@mailman.ccsds.org">sls-sea-dls-bounces@mailman.ccsds.org</a>>
<b>On Behalf Of </b>Moury Gilles<b><br>
Sent:</b> Friday, February 5, 2021 11:44 AM<b><br>
To:</b> <a href="mailto:sls-sea-dls@mailman.ccsds.org">sls-sea-dls@mailman.ccsds.org</a><b><br>
Subject:</b> [EXTERNAL] [Sls-sea-dls] TR: CCSDS Order of Processing: Figure 6-3 in CCSDS 232.0 and Figure 3-3 in CCSDS 350.5-G</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080">Dear SDLS WG member,</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080">The order of processing between SDLS and the COP in TC has raised questions by implementing projects. To clarify the matter
and provide a complete justification, Greg Kazz (SLP WG chairman) proposes to include an additional paragraph in the SDLS Green Book (355.0-G) (see exchange of mails hereafter). A text along the following lines is proposed to be inserted in front of Figure
3-3 on page 3-10:</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080">“There are several reasons for this ordering of SDLS and COP functions :</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080"> </span><span lang="EN-US"><o:p></o:p></span></p>
<ul type="disc">
<li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l3 level1 lfo3">
<span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080">COP-1, being a go-back-N retransmission protocol, will eventually replay TC frames. SDLS is a function providing anti-replay protection, integrity and confidentiality.
Therefore if FOP is applied before SDLS at the sending end, and SDLS before FARM at the receiving end, SDLS at the receiving end will discard all replayed frames by COP-1, thus defeating the COP.</span><span lang="EN-US">
<o:p></o:p></span></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l3 level1 lfo3">
<span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080">SDLS at the receiving end checks integrity of TC frames by checking the MAC. The MAC is a very powerful error detecting code (in fact much more powerful than the BCH
code). Therefore, SDLS receiving end will discard all TC frames impacted by transmission errors, if the FARM is applied after SDLS. This has two impacts :</span><span lang="EN-US" style="font-family:"Calibri",sans-serif">
</span><span lang="EN-US"><o:p></o:p></span>
<ul type="circle">
<li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l3 level2 lfo3">
<span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080">Accountability of transmission errors vs security related events cannot be made : all errors are detected by SDLS and therefore classified as security events</span><span lang="EN-US">
<o:p></o:p></span></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l3 level2 lfo3">
<span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080">COP-1 will replay those SDLS rejected frames, because the FARM will never see them. Those replayed TC frames will be later rejected as replay by SDLS.”</span><span lang="EN-US"><o:p></o:p></span></li></ul>
</li></ul>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080"> </span><span lang="EN-US">
<o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080">SDLS GB (355.0-G-1) is due for 5-year review in 2023. Nevertheless, GB do not have the same stability requirement as Blue
Book and could possibly be updated more frequently. The proposal I would like to submit to the WG is to prepare an update of the GB this year to include this justification and any other clarifications/additions/updates that might be beneficial. Of course the
proposed text is to be discussed and tuned so that it fits properly in that section.</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080">Please do not hesitate to comment on that proposal so that we can initiate or not this GB update.</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080">Best regards,</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080">Gilles Moury</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080">SDLS WG chair</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#004080">Gilles MOURY</span><span lang="EN-US" style="color:#004080">
</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#004080"><br>
CNES Toulouse</span><span lang="EN-US" style="color:#004080"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">De :</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Kazz, Greg J (US 312B) <</span><span lang="EN-US"><a href="mailto:greg.j.kazz@jpl.nasa.gov"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#0082BF">greg.j.kazz@jpl.nasa.gov</span></a></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">>
<b><br>
Envoyé :</b> jeudi 21 janvier 2021 18:12<b><br>
À :</b> Biggerstaff, Craig (JSC-CD42)[SGT, INC] <</span><span lang="EN-US"><a href="mailto:craig.biggerstaff@nasa.gov"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#0082BF">craig.biggerstaff@nasa.gov</span></a></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">>;
Moury Gilles <</span><span lang="EN-US"><a href="mailto:Gilles.Moury@cnes.fr"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#0082BF">Gilles.Moury@cnes.fr</span></a></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">>;
Weiss, Howard <</span><span lang="EN-US"><a href="mailto:Howard.Weiss@parsons.com"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#0082BF">Howard.Weiss@parsons.com</span></a></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">>;
</span><span lang="EN-US"><a href="mailto:Gian.Paolo.Calzolari@esa.int"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#0082BF">Gian.Paolo.Calzolari@esa.int</span></a></span><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"><br>
Cc :</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Shames, Peter M (US 312B) <</span><span lang="EN-US"><a href="mailto:peter.m.shames@jpl.nasa.gov"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#0082BF">peter.m.shames@jpl.nasa.gov</span></a></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">>;
Sank, Victor J. (GSFC-567.0)[SCIENCE SYSTEMS AND APPLICATIONS INC] <</span><span lang="EN-US"><a href="mailto:victor.j.sank@nasa.gov"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#0082BF">victor.j.sank@nasa.gov</span></a></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">>;
Andres, Brent (GSFC-567.0)[SCIENCE SYSTEMS AND APPLICATIONS INC] <</span><span lang="EN-US"><a href="mailto:brent.r.andres@nasa.gov"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#0082BF">brent.r.andres@nasa.gov</span></a></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">>;
Matthew Cosby <</span><span lang="EN-US"><a href="mailto:Matt.Cosby@Goonhilly.org"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#0082BF">Matt.Cosby@Goonhilly.org</span></a></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">>;
Thomas Gannett <</span><span lang="EN-US"><a href="mailto:thomas.gannett@tgannett.net"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#0082BF">thomas.gannett@tgannett.net</span></a></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">><b><br>
Objet :</b> Re: CCSDS Order of Processing: Figure 6-3 in CCSDS 232.0 and Figure 3-3 in CCSDS 350.5-G</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">That would be in 2023, 3 years from now…since security is on everybody’s plate these days, I highly recommend it get updated this year.
It is a Green book, so I would hope we have more discretion and flexibility in updating them more frequently than the blue books. I understand the rationale for not updating blue books that often.</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">Thanks!<br>
Greg</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><b><span lang="EN-US" style="font-family:"Calibri",sans-serif">From:
</span></b><span lang="EN-US" style="font-family:"Calibri",sans-serif">"Biggerstaff, Craig (JSC-CD42)[SGT, INC]" <</span><span lang="EN-US"><a href="mailto:craig.biggerstaff@nasa.gov"><span style="font-family:"Calibri",sans-serif;color:#0082BF">craig.biggerstaff@nasa.gov</span></a></span><span lang="EN-US" style="font-family:"Calibri",sans-serif">><b><br>
Date: </b>Thursday, January 21, 2021 at 8:53 AM<b><br>
To: </b>"Kazz, Greg J (US 312B)" <</span><span lang="EN-US"><a href="mailto:greg.j.kazz@jpl.nasa.gov"><span style="font-family:"Calibri",sans-serif;color:#0082BF">greg.j.kazz@jpl.nasa.gov</span></a></span><span lang="EN-US" style="font-family:"Calibri",sans-serif">>,
Moury Gilles <</span><span lang="EN-US"><a href="mailto:Gilles.Moury@cnes.fr"><span style="font-family:"Calibri",sans-serif;color:#0082BF">Gilles.Moury@cnes.fr</span></a></span><span lang="EN-US" style="font-family:"Calibri",sans-serif">>, "Weiss, Howard"
<</span><span lang="EN-US"><a href="mailto:Howard.Weiss@parsons.com"><span style="font-family:"Calibri",sans-serif;color:#0082BF">Howard.Weiss@parsons.com</span></a></span><span lang="EN-US" style="font-family:"Calibri",sans-serif">><b><br>
Cc: </b>"Shames, Peter M (US 312B)" <</span><span lang="EN-US"><a href="mailto:peter.m.shames@jpl.nasa.gov"><span style="font-family:"Calibri",sans-serif;color:#0082BF">peter.m.shames@jpl.nasa.gov</span></a></span><span lang="EN-US" style="font-family:"Calibri",sans-serif">>,
"</span><span lang="EN-US"><a href="mailto:Gian.Paolo.Calzolari@esa.int"><span style="font-family:"Calibri",sans-serif;color:#0082BF">Gian.Paolo.Calzolari@esa.int</span></a></span><span lang="EN-US" style="font-family:"Calibri",sans-serif">" <</span><span lang="EN-US"><a href="mailto:Gian.Paolo.Calzolari@esa.int"><span style="font-family:"Calibri",sans-serif;color:#0082BF">Gian.Paolo.Calzolari@esa.int</span></a></span><span lang="EN-US" style="font-family:"Calibri",sans-serif">>,
"Sank, Victor J. (GSFC-567.0)[SCIENCE SYSTEMS AND APPLICATIONS INC]" <</span><span lang="EN-US"><a href="mailto:victor.j.sank@nasa.gov"><span style="font-family:"Calibri",sans-serif;color:#0082BF">victor.j.sank@nasa.gov</span></a></span><span lang="EN-US" style="font-family:"Calibri",sans-serif">>,
"Andres, Brent (GSFC-567.0)[SCIENCE SYSTEMS AND APPLICATIONS INC]" <</span><span lang="EN-US"><a href="mailto:brent.r.andres@nasa.gov"><span style="font-family:"Calibri",sans-serif;color:#0082BF">brent.r.andres@nasa.gov</span></a></span><span lang="EN-US" style="font-family:"Calibri",sans-serif">>,
Matthew Cosby <</span><span lang="EN-US"><a href="mailto:Matt.Cosby@Goonhilly.org"><span style="font-family:"Calibri",sans-serif;color:#0082BF">Matt.Cosby@Goonhilly.org</span></a></span><span lang="EN-US" style="font-family:"Calibri",sans-serif">>, Thomas
Gannett <</span><span lang="EN-US"><a href="mailto:thomas.gannett@tgannett.net"><span style="font-family:"Calibri",sans-serif;color:#0082BF">thomas.gannett@tgannett.net</span></a></span><span lang="EN-US" style="font-family:"Calibri",sans-serif">><b><br>
Subject: </b>RE: CCSDS Order of Processing: Figure 6-3 in CCSDS 232.0 and Figure 3-3 in CCSDS 350.5-G</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080">I agree with incorporating Gilles’ text. The normal opportunity to do this would be the Green Book’s 5-year review/revision
cycle.</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080">Best regards,</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080">Craig</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Kazz, Greg J (US 312B) <</span><span lang="EN-US"><a href="mailto:greg.j.kazz@jpl.nasa.gov"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#0082BF">greg.j.kazz@jpl.nasa.gov</span></a></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">>
<b><br>
Sent:</b> Wednesday, January 20, 2021 6:15 PM<b><br>
To:</b> Moury Gilles <</span><span lang="EN-US"><a href="mailto:Gilles.Moury@cnes.fr"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#0082BF">Gilles.Moury@cnes.fr</span></a></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">>;
Biggerstaff, Craig (JSC-CD42)[SGT, INC] <</span><span lang="EN-US"><a href="mailto:craig.biggerstaff@nasa.gov"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#0082BF">craig.biggerstaff@nasa.gov</span></a></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">>;
Weiss, Howard <</span><span lang="EN-US"><a href="mailto:Howard.Weiss@parsons.com"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#0082BF">Howard.Weiss@parsons.com</span></a></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">><b><br>
Cc:</b> Shames, Peter M (JPL-312B)[JPL Employee] <</span><span lang="EN-US"><a href="mailto:peter.m.shames@jpl.nasa.gov"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#0082BF">peter.m.shames@jpl.nasa.gov</span></a></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">>;
</span><span lang="EN-US"><a href="mailto:Gian.Paolo.Calzolari@esa.int"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#0082BF">Gian.Paolo.Calzolari@esa.int</span></a></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">;
Sank, Victor J. (GSFC-567.0)[SCIENCE SYSTEMS AND APPLICATIONS INC] <</span><span lang="EN-US"><a href="mailto:victor.j.sank@nasa.gov"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#0082BF">victor.j.sank@nasa.gov</span></a></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">>;
Andres, Brent (GSFC-567.0)[SCIENCE SYSTEMS AND APPLICATIONS INC] <</span><span lang="EN-US"><a href="mailto:brent.r.andres@nasa.gov"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#0082BF">brent.r.andres@nasa.gov</span></a></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">>;
Matthew Cosby <</span><span lang="EN-US"><a href="mailto:Matt.Cosby@Goonhilly.org"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#0082BF">Matt.Cosby@Goonhilly.org</span></a></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">>;
Thomas Gannett <</span><span lang="EN-US"><a href="mailto:thomas.gannett@tgannett.net"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#0082BF">thomas.gannett@tgannett.net</span></a></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">><b><br>
Subject:</b> CCSDS Order of Processing: Figure 6-3 in CCSDS 232.0 and Figure 3-3 in CCSDS 350.5-G</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:14.0pt;font-family:"Calibri",sans-serif">Gilles, Craig, and Howie,</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:14.0pt;font-family:"Calibri",sans-serif"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:14.0pt;font-family:"Calibri",sans-serif">What Gilles provided me, Victor, and Brent (highlighted below, i.e., his bullet points) was an excellent explanation, as to why the COP
has to be applied <i>after</i> SDLS at the sending end. And because this topic seems to come up again and again at least at NASA and perhaps at other agencies as well, I strongly recommend that we take Gilles’ text below and put it into a new paragraph in
front of figure 3-3 on p. 3-10 in CCSDS 350.5-G (June 2018) to augment the rationale for that figure. I believe it will be useful for user’s to understand the rationale for processing between COP and SDLS. Note that figure 3-3 is identical to figure 6-3 in
CCSDS 232.0.</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:14.0pt;font-family:"Calibri",sans-serif"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:14.0pt;font-family:"Calibri",sans-serif">What does the SDLS WG think of this recommendation ?</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:14.0pt;font-family:"Calibri",sans-serif"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:14.0pt;font-family:"Calibri",sans-serif">Best regards,</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:14.0pt;font-family:"Calibri",sans-serif">Greg</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><b><span lang="EN-US" style="font-family:"Calibri",sans-serif">From:
</span></b><span lang="EN-US" style="font-family:"Calibri",sans-serif">Moury Gilles <</span><span lang="EN-US"><a href="mailto:Gilles.Moury@cnes.fr"><span style="font-family:"Calibri",sans-serif;color:#0082BF">Gilles.Moury@cnes.fr</span></a></span><span lang="EN-US" style="font-family:"Calibri",sans-serif">><b><br>
Date: </b>Tuesday, January 12, 2021 at 3:57 AM<b><br>
To: </b>"Kazz, Greg J (US 312B)" <</span><span lang="EN-US"><a href="mailto:greg.j.kazz@jpl.nasa.gov"><span style="font-family:"Calibri",sans-serif;color:#0082BF">greg.j.kazz@jpl.nasa.gov</span></a></span><span lang="EN-US" style="font-family:"Calibri",sans-serif">><b><br>
Cc: </b>"Sank, Victor J. (GSFC-567.0)[SCIENCE SYSTEMS AND APPLICATIONS INC]" <</span><span lang="EN-US"><a href="mailto:victor.j.sank@nasa.gov"><span style="font-family:"Calibri",sans-serif;color:#0082BF">victor.j.sank@nasa.gov</span></a></span><span lang="EN-US" style="font-family:"Calibri",sans-serif">><b><br>
Subject: </b>[EXTERNAL] RE: CCSDS Order of Processing: Figure 6-3 in CCSDS 232.0</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080">Dear Greg and Victor,</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080">All my best wishes for 2021 ! I hope we can meet in person this year !</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080">There are several reasons for this ordering of SDLS and COP functions :</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080"> </span><span lang="EN-US"><o:p></o:p></span></p>
<ul type="disc">
<li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo6">
<span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080">COP-1, being a go-back-N retransmission protocol, will eventually replay TC frames. SDLS is a function providing anti-replay protection, integrity and confidentiality.
Therefore if FOP is applied before SDLS at the sending end, and SDLS before FARM at the receiving end, SDLS at the receiving end will discard all replayed frames by COP-1, thus defeating the COP.</span><span lang="EN-US">
<o:p></o:p></span></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo6">
<span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080">SDLS at the receiving end checks integrity of TC frames by checking the MAC. The MAC is a very powerful error detecting code (in fact much more powerful than the BCH
code). Therefore, SDLS receiving end will discard all TC frames impacted by transmission errors, if the FARM is applied after SDLS. This has two impacts :</span><span lang="EN-US" style="font-family:"Calibri",sans-serif">
</span><span lang="EN-US"><o:p></o:p></span>
<ul type="circle">
<li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level2 lfo6">
<span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080">Accountability of transmission errors vs security related events cannot be made : all errors are detected by SDLS and therefore classified as security events</span><span lang="EN-US">
<o:p></o:p></span></li><li class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level2 lfo6">
<span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080">COP-1 will replay those SDLS rejected frames, because the FARM will never see them. Those replayed TC frames will be later rejected as replay by SDLS.</span><span lang="EN-US"><o:p></o:p></span></li></ul>
</li></ul>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:36.0pt">
<span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080">I hope this clarifies the matter.</span><span lang="EN-US">
<o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080">Best regards,</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080">Gilles</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#004080"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#004080">Gilles MOURY</span><span lang="EN-US" style="color:#004080">
</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#004080"><br>
CNES Toulouse</span><span lang="EN-US" style="color:#004080"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">De :</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Kazz, Greg J (US 312B) <</span><span lang="EN-US"><a href="mailto:greg.j.kazz@jpl.nasa.gov"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#0082BF">greg.j.kazz@jpl.nasa.gov</span></a></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">>
<b><br>
Envoyé :</b> dimanche 10 janvier 2021 18:52<b><br>
À :</b> Moury Gilles <</span><span lang="EN-US"><a href="mailto:Gilles.Moury@cnes.fr"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#0082BF">Gilles.Moury@cnes.fr</span></a></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">><b><br>
Cc :</b> Sank, Victor J. (GSFC-567.0)[SCIENCE SYSTEMS AND APPLICATIONS INC] <</span><span lang="EN-US"><a href="mailto:victor.j.sank@nasa.gov"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#0082BF">victor.j.sank@nasa.gov</span></a></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">><b><br>
Objet :</b> CCSDS Order of Processing: Figure 6-3 in CCSDS 232.0</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif">Happy New Year, Gilles !</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif">Victor Sank and I have a question for you, which I would like to ask you again to confirm my understanding, or correct my thinking.</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif">Why must the FOP on the ground be done after SDLS is applied ? In other words, “why can’t the Frame Sequence Number in the Transfer Frame Primary Header,
be input/applied prior to the SDSL ApplySecurity? “ </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif">I vaguely remember you saying something like, if the order were reversed (do FOP first, and then SDLS), there would be no way to know why a transfer frame
was rejected and therefore the project would not have the accountability it needs to take the correct action. There would be
<i>no definitive</i> accountability as to <i>why </i>a given<i> </i>transfer frames was rejected i.e., was it first rejected by SDLS because of an intentional cyber attack or was it just a non-cyber related incident detected by SDLS security (e.g., bit flips
due to a regular noisy channel). By executing the FOP-1 and the FARM-1 together as a pair, i.e., back to back as Figure 6-3 shows, you get clean accountability back from SDLS and also from the FARM (if the frame passes SDLS, then the FARM can determine if
any other COP rules have been violated or not, independent of SDLS). </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif">Is my explanation above also your understanding ?</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif">Best regards,</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif">Greg</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif"> </span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">Greg Kazz</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">Principal Engineer</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">Technical Group Supervisor,</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">PSSE/EEISE/PPSE (312B)</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">Jet Propulsion Laboratory</span><span lang="EN-US"><img border="0" width="1366" height="892" style="width:14.2291in;height:9.2916in" id="_x0000_i1029" src="cid:image003.png@01D74528.4ADD3B60"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">4800 Oak Grove Dr., M/S 301-490</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">Pasadena, CA 91109</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">1+(818)393 6529(voice)</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">1+(818)393 6871(fax)</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">email:
</span><span lang="EN-US"><a href="mailto:greg.j.kazz@jpl.nasa.gov"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#0082BF">greg.j.kazz@jpl.nasa.gov</span></a></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">
</span><span lang="EN-US"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt"><span lang="EN-US" style="font-family:"Calibri",sans-serif"> [attachment "SDLS & COP interactions.vsd" deleted by Ignacio Aguilar Sanchez/estec/ESA]
</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="EN-US"><br>
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