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</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><span style='font-family:"Aptos",sans-serif;mso-fareast-language:EN-US'>Dear Tomaso and All,<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Aptos",sans-serif;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Aptos",sans-serif;mso-fareast-language:EN-US'>Please find below proposals for agenda items for the SEC-DTN meeting:<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Aptos",sans-serif;mso-fareast-language:EN-US'><o:p> </o:p></span></p><ul style='margin-top:0cm' type=disc><li class=MsoListParagraph style='margin-left:0cm;mso-list:l2 level1 lfo3'><span style='font-family:"Aptos",sans-serif;mso-fareast-language:EN-US'>BPSec security model analysis (X. Tian et al) – ~45 min<o:p></o:p></span></li></ul><p class=MsoListParagraph style='margin-left:72.0pt'><span style='font-family:"Aptos",sans-serif;mso-fareast-language:EN-US'><o:p> </o:p></span></p><ul style='margin-top:0cm' type=disc><li class=MsoListParagraph style='margin-left:0cm;mso-list:l2 level1 lfo3'><span style='font-family:"Aptos",sans-serif;mso-fareast-language:EN-US'>Bundle Protocol Key Distribution (BPKD) testbed (ESA) – ~1hr<o:p></o:p></span></li><ul style='margin-top:0cm' type=circle><li class=MsoListParagraph style='margin-left:0cm;mso-list:l2 level2 lfo3'><span style='font-family:"Aptos",sans-serif;mso-fareast-language:EN-US'>Updates and scenario test results<o:p></o:p></span></li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l2 level2 lfo3'><span style='font-family:"Aptos",sans-serif;mso-fareast-language:EN-US'>Discussion<o:p></o:p></span></li></ul></ul><p class=MsoNormal><span style='font-family:"Aptos",sans-serif;mso-fareast-language:EN-US'><o:p> </o:p></span></p><ul style='margin-top:0cm' type=disc><li class=MsoListParagraph style='margin-left:0cm;mso-list:l2 level1 lfo3'><span style='font-family:"Aptos",sans-serif;mso-fareast-language:EN-US'>Other Discussion items (All) - ~45 min<o:p></o:p></span></li><ul style='margin-top:0cm' type=circle><li class=MsoListParagraph style='margin-left:0cm;mso-list:l2 level2 lfo3'><span style='font-family:"Aptos",sans-serif;mso-fareast-language:EN-US'>Interplanetary MultiCast (IMC) – security considerations section<o:p></o:p></span></li><ul style='margin-top:0cm' type=square><li class=MsoListParagraph style='margin-left:0cm;mso-list:l2 level3 lfo3'><span style='font-family:"Aptos",sans-serif;mso-fareast-language:EN-US'>Preliminary content ideas<o:p></o:p></span></li></ul></ul></ul><p class=MsoListParagraph style='margin-left:108.0pt'><span style='font-family:"Aptos",sans-serif;mso-fareast-language:EN-US'>Plan/actions to produce<o:p></o:p></span></p><ul style='margin-top:0cm' type=disc><ul style='margin-top:0cm' type=circle><li class=MsoListParagraph style='margin-left:0cm;mso-list:l2 level2 lfo3'><span style='font-family:"Aptos",sans-serif;mso-fareast-language:EN-US'>BPSec Interoperability Testing<o:p></o:p></span></li><ul style='margin-top:0cm' type=square><li class=MsoListParagraph style='margin-left:0cm;mso-list:l2 level3 lfo3'><span style='font-family:"Aptos",sans-serif;mso-fareast-language:EN-US'>Pre-requisites (readiness, default security contexts, alignment with existing BP setup, ..)<o:p></o:p></span></li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l2 level3 lfo3'><span style='font-family:"Aptos",sans-serif;mso-fareast-language:EN-US'>Alignment on possible Recommended Practice for SSI Interoperability Testing<o:p></o:p></span></li><li class=MsoListParagraph style='margin-left:0cm;mso-list:l2 level3 lfo3'><span style='font-family:"Aptos",sans-serif;mso-fareast-language:EN-US'>Tentative schedule & participants<o:p></o:p></span></li></ul></ul></ul><p class=MsoListParagraph style='margin-left:72.0pt'><span style='font-family:"Aptos",sans-serif;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Aptos",sans-serif;mso-fareast-language:EN-US'>Best regards,<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Aptos",sans-serif;mso-fareast-language:EN-US'>Marcus<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Aptos",sans-serif;mso-fareast-language:EN-US'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US>From:</span></b><span lang=EN-US> Tomaso.deCola@dlr.de <Tomaso.deCola@dlr.de> <br><b>Sent:</b> Tuesday, September 24, 2024 10:48 AM<br><b>To:</b> keithlscott@gmail.com; xisen.tian1@nps.edu<br><b>Cc:</b> sis-dtn@mailman.ccsds.org; britta.hale@nps.edu; b.m.wimalasiri@sheffield.ac.uk; dowling.bj@gmail.com; durst@mitre.org; Howard.Weiss@parsons.us; Marcus Wallum <Marcus.Wallum@esa.int><br><b>Subject:</b> RE: [Sis-dtn] Spring Meeting Agenda Add: BPSec Analysis and Improvements<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-US>Hi Keith, All,<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>Concerning the meetings schedule, the slot for the joint SEC/DTN meeting is already scheduled on Thursday the 7<sup>th</sup> in the afternoon, starting from 1330. My suggestion would be then to iterate with SEC folks to come up with a list of items and related time allocation for the joint meeting. I’m cc’ing Howie and Marcus to converge.<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>Regards,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><br>Tomaso<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=EN-US>From:</span></b><span lang=EN-US> Keith Scott <</span><a href="mailto:keithlscott@gmail.com"><span lang=EN-US>keithlscott@gmail.com</span></a><span lang=EN-US>> <br><b>Sent:</b> Dienstag, 24. September 2024 10:39<br><b>To:</b> Tian, Xisen (LT) <</span><a href="mailto:xisen.tian1@nps.edu"><span lang=EN-US>xisen.tian1@nps.edu</span></a><span lang=EN-US>><br><b>Cc:</b> </span><a href="mailto:sis-dtn@mailman.ccsds.org"><span lang=EN-US>sis-dtn@mailman.ccsds.org</span></a><span lang=EN-US>; Hale, Britta (CIV) <</span><a href="mailto:britta.hale@nps.edu"><span lang=EN-US>britta.hale@nps.edu</span></a><span lang=EN-US>>; Bhagya Wimalasiri <</span><a href="mailto:b.m.wimalasiri@sheffield.ac.uk"><span lang=EN-US>b.m.wimalasiri@sheffield.ac.uk</span></a><span lang=EN-US>>; Benjamin Dowling <</span><a href="mailto:dowling.bj@gmail.com"><span lang=EN-US>dowling.bj@gmail.com</span></a><span lang=EN-US>>; Robert C Durst <</span><a href="mailto:durst@mitre.org"><span lang=EN-US>durst@mitre.org</span></a><span lang=EN-US>>; de Cola, Tomaso <</span><a href="mailto:Tomaso.deCola@dlr.de"><span lang=EN-US>Tomaso.deCola@dlr.de</span></a><span lang=EN-US>><br><b>Subject:</b> Re: [Sis-dtn] Spring Meeting Agenda Add: BPSec Analysis and Improvements<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><div><p class=MsoNormal><span lang=EN-US>Xisen, this seems very interesting and useful. I added a possible agenda item for the </span><a href="https://eur05.safelinks.protection.outlook.com/?url=https%3A%2F%2Fpublic.ccsds.org%2Fmeetings%2F2024Fall%2Fdefault.aspx&data=05%7C02%7CMarcus.Wallum%40esa.int%7C6c6586103f6e496bf24808dcdc758893%7C9a5cacd02bef4dd7ac5c7ebe1f54f495%7C0%7C0%7C638627644608512977%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=YjxA7WndYbz7NMnmjIeyYmpbfG9a6HC3D9zRyIbQ33A%3D&reserved=0"><span lang=EN-US>Fall CCSDS meetings</span></a><span lang=EN-US> where the SIS-DTN WG will have a joint meeting with the Security WG. I don't think we have a date/time for that nailed down yet but when we do we can see if we can get you in there.<o:p></o:p></span></p><div><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US>Best Regards,<o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US> --keith<o:p></o:p></span></p></div></div><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><div><div><p class=MsoNormal><span lang=EN-US>On Tue, Sep 24, 2024 at 3:23 AM Tian, Xisen (LT) via SIS-DTN <</span><a href="mailto:sis-dtn@mailman.ccsds.org"><span lang=EN-US>sis-dtn@mailman.ccsds.org</span></a><span lang=EN-US>> wrote:<o:p></o:p></span></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt'><div><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US>Hello, <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US> <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US> <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US>I’m Xisen Tian, I’m a PhD student being advised by Dr. Britta Hale and Scott Burleigh at the Naval Postgraduate School researching cryptographic analysis of DTN protocols. My co-authors (cc’d) and I have completed a formal analysis of BPSec with recommendations for improvements which we are ready to present to the DTN WG at the upcoming fall meeting in London. We would like to request a 30-45 minute time slot in the agenda to do a presentation of our work followed by discussion on how our improvements could be adopted (if at all). Our full paper is forthcoming: it has been submitted to a journal and we are currently going through the review/revision process. I’ve pasted our abstract below:<o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US>ABSTRACT: Space networking has become an increasing area of development with the advent of commercial satellite networks such as those hosted by Starlink and Kuiper, and increased satellite and space presence by governments around the world. Yet, historically such network designs have not been made public, leading to limited formal cryptographic analysis of the security offered by them. One of the few public protocols used in space networking is the Bundle Protocol, which is secured by Bundle Protocol Security (BPSec), an Internet Engineering Task Force (IETF) standard. We undertake a first analysis of BPSec, building a model of the secure channel security goals stated in the IETF standard, and note issues therein with message loss detection. We prove security of BPSec under a limited model and also provide a stronger construction, one that supports the Bundle Protocol’s functionality goals while also ensuring destination awareness of missing messages components.<o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US> <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US>Please let me know if you have questions, concerns, or feedback. Thank you. <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US> <o:p></o:p></span></p><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US>Very Respectfully, <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US> <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US>Xisen Tian<o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US>LT USN <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US>PhD Student<o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US>Applied Cryptography<o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US>Naval Postgraduate School<o:p></o:p></span></p></div></div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US> <o:p></o:p></span></p></div></div><p class=MsoNormal><span lang=EN-US>_______________________________________________<br>SIS-DTN mailing list<br></span><a href="mailto:SIS-DTN@mailman.ccsds.org" target="_blank"><span lang=EN-US>SIS-DTN@mailman.ccsds.org</span></a><span lang=EN-US><br></span><a href="https://eur05.safelinks.protection.outlook.com/?url=https%3A%2F%2Fmailman.ccsds.org%2Fcgi-bin%2Fmailman%2Flistinfo%2Fsis-dtn&data=05%7C02%7CMarcus.Wallum%40esa.int%7C6c6586103f6e496bf24808dcdc758893%7C9a5cacd02bef4dd7ac5c7ebe1f54f495%7C0%7C0%7C638627644608537464%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=DrU9q3d5OH4yoS0XgktR9xuL9JNKEMFvUV23u6RyVjw%3D&reserved=0" target="_blank"><span lang=EN-US>https://mailman.ccsds.org/cgi-bin/mailman/listinfo/sis-dtn</span></a><span lang=EN-US><o:p></o:p></span></p></div></blockquote></div></div></body></html>