Security Cryptography Whatever

No not the movie: the secure group messaging protocol! Or rather all the bugs and vulns that a team of researchers found when trying to formalize said protocol. Martin Albrecht and Dan Jones joined us to walk us through "Practically-exploitable CryptographicVulnerabilities in Matrix".Transcript:https://securitycryptographywhatever.com/2022/11/02/Matrix-with-Martin-Albrecht-Dan-Jones/Links: https://nebuchadnezzar-megolm.github.io/static/paper.pdfhttps://nebuchadnezzar-megolm.github.ioSignal Private Group system: https://eprint.iacr.org/2019/1416.pdfhttps://signal.org/blog/signal-private-group-system/https://spec.matrix.org/latest/WhatsApp Security Whitepaper: https://www.whatsapp.com/security/WhatsApp-Security-Whitepaper.pdfhttps://www.usenix.org/conference/usenixsecurity21/presentation/albrecht FS, PCS etcOther clients: https://nvd.nist.gov/vuln/detail/CVE-2022-39252 https://nvd.nist.gov/vuln/detail/CVE-2022-39254 https://nvd.nist.gov/vuln/detail/CVE-2022-39264 https://dadrian.io/blog/posts/roll-your-own-crypto/https://podcasts.apple.com/us/podcast/the-great-roll-your-own-crypto-debate-feat-filippo-valsorda/id1578405214?i=1000530617719 WhatsApp End-to-End Encrypted Backups: https://blog.whatsapp.com/end-to-end-encrypted-backups-on-whatsappRoll your own and Telegram: https://mtpsym.github.io/ "Security Cryptography Whatever" is hosted by Deirdre Connolly (@durumcrustulum), Thomas Ptacek (@tqbf), and David Adrian (@davidcadrian)

We have Sarah Harvey (@worldwise001 on Twitter) to talk about SOC2, what it means, how to get it, and if it's important or not. The discussion centers around two blog posts written by Thomas:SOC2 Starting Seven: https://latacora.micro.blog/2020/03/12/the-soc-starting.htmlSOC2 at Fly: https://fly.io/blog/soc2-the-screenshots-will-continue-until-security-improves/Transcript:https://securitycryptographywhatever.com/2022/10/16/SOC2-with-Sarah-Harvey/Links:Tailscale recent post on getting SOC2’d: https://tailscale.com/blog/soc2-type2/SSO Tax: https://sso.taxDavid’s previous job: https://getnametag.comDavid's other startup: https://censys.ioThomas works at https://fly.io"Security Cryptography Whatever" is hosted by Deirdre Connolly (@durumcrustulum), Thomas Ptacek (@tqbf), and David Adrian (@davidcadrian)

This episode got delayed because David got COVID. Anyway, here's Nate Lawson: The Two Towers.Steven Chu: https://en.wikipedia.org/wiki/Steven_ChuCFB: https://en.wikipedia.org/wiki/Block_cipher_mode_of_operation#Cipher_feedback_(CFB)CCFB: https://link.springer.com/chapter/10.1007/11502760_19XXTEA: https://en.wikipedia.org/wiki/XXTEACHERI: https://cseweb.ucsd.edu/~dstefan/cse227-spring20/papers/watson:cheri.pdfTranscript:https://securitycryptographywhatever.com/2022/09/29/nate-lawson-ii/Errata:Pedram Amini did in fact do Pai Mei"Security Cryptography Whatever" is hosted by Deirdre Connolly (@durumcrustulum), Thomas Ptacek (@tqbf), and David Adrian (@davidcadrian)

We bring on Nate Lawson of Root Labs to talk about a little bit of everything, starting with cryptography in the 1990s.Transcript:https://securitycryptographywhatever.com/2022/09/09/nate-lawson-part-1/ReferencesIBM S/390: https://ieeexplore.ieee.org/document/5389176SSLv2 Spec: https://www-archive.mozilla.org/projects/security/pki/nss/ssl/draft02.htmlXbox 360 HMAC: https://beta.ivc.no/wiki/index.php/Xbox_360_Timing_AttackGoogle Keyczar HMAC bug (reported by Nate): https://rdist.root.org/2009/05/28/timing-attack-in-google-keyczar-library/ErrataHMAC actually published in 1996, not 1997"That was one of the first, I think hardware applications of DPA was, was, um, satellite TV cards." Not true, they first were able to break Mondex, a MasterCard smart card"Security Cryptography Whatever" is hosted by Deirdre Connolly (@durumcrustulum), Thomas Ptacek (@tqbf), and David Adrian (@davidcadrian)

Are the isogenies kaput?! There's a new attack that breaks all the known parameter sets for SIDH/SIKE, so Steven Galbraith helps explain where the hell this came from, and where isogeny crypto goes from here.Transcript: https://securitycryptographywhatever.com/2022/08/11/hot-cryptanalytic-summer-with-steven-galbraith/Merch: https://merch.scwpodcast.comLinks:https://eprint.iacr.org/2022/975.pdfhttps://eprint.iacr.org/2022/1026.pdfhttps://ellipticnews.wordpress.com/2022/07/31/breaking-supersingular-isogeny-diffie-hellman-sidh/GPST active adaptive attack against SIDH: https://eprint.iacr.org/2016/859.pdfFailing to hash into supersingular isogeny graphs: https://eprint.iacr.org/2022/518.pdfhttps://research.nccgroup.com/2022/08/08/implementing-the-castryck-decru-sidh-key-recovery-attack-in-sagemath/Kuperberg attack via Peikert: https://eprint.iacr.org/2019/725.pdfSQISign: https://eprint.iacr.org/2020/1240.pdf(Post recording)  Breaking SIDH in polynomial time:https://eprint.iacr.org/2022/1038.pdf"Security Cryptography Whatever" is hosted by Deirdre Connolly (@durumcrustulum), Thomas Ptacek (@tqbf), and David Adrian (@davidcadrian)

Adam Langley (Google) comes on the podcast to talk about the evolution of WebAuthN and Passkeys!David's audio was a little finicky in this one. Believe us, it sounded worse before we edited it. Also, we occasionally accidentally refer to U2F as UTF. That's because we just really love strings.Transcript: https://securitycryptographywhatever.com/2022/08/11/passkeys-with-adam-langley/Links:GoogleIO PresentationWWDC PresentationW3C WebAuthNAdam's blog on passkeys and CABLECable / Hybrid PRCTAP spec from FIDONoise NKPSKDERPDon't forget about merch! https://merch.securitycryptographywhatever.com/"Security Cryptography Whatever" is hosted by Deirdre Connolly (@durumcrustulum), Thomas Ptacek (@tqbf), and David Adrian (@davidcadrian)

Side channels! Frequency scaling! Key encapsulation, oh my! We're talking about the new Hertzbleed paper, but also cryptography conferences, 'passkeys', and end-to-end encrypting yer twitter.com DMs.Transcript: https://securitycryptographywhatever.com/2022/06/17/hertzbleed/ Links:Hertzbleed Attack | ellipticnews (wordpress.com)https://www.hertzbleed.com/hertzbleed.pdfhttps://papers.ssrn.com/sol3/papers.cfm?abstract_id=3920031Merch: https://merch.scwpodcast.com"Security Cryptography Whatever" is hosted by Deirdre Connolly (@durumcrustulum), Thomas Ptacek (@tqbf), and David Adrian (@davidcadrian)

The US government released a memo about moving to a zero-trust network architecture. What does this mean? We have one of the authors, Eric Mill, on to explain it to us.As always, your @SCWPod hosts are Deirdre Connolly (@durumcrustulum), Thomas Ptacek (@tqbf), and David Adrian (@davidcadrian).Transcript: https://securitycryptographywhatever.com/2022/06/10/omb-zero-trust-memo-with-eric-mill/Links:OMB MemoExecutive order on cybersecurity PIV card Derived PIVBeyondCorpHSTS Preloading.gov preloading Neither Rain, Nor Snow, Nor MITMEDR memoTechnology Transformation Services (TTS)Is it Christmas?"Security Cryptography Whatever" is hosted by Deirdre Connolly (@durumcrustulum), Thomas Ptacek (@tqbf), and David Adrian (@davidcadrian)

We talk about Tink with Sophie Schmieg, cryptographer and algebraic geometer at Google.Transcript: https://securitycryptographywhatever.com/2022/05/28/tink-with-sophie-schmieg/Links:Sophie: https://twitter.com/SchmiegSophieTink: https://github.com/google/tinkRWC talk: https://youtube.com/watch?t=1028&v=CiH6iqjWpt8Where to store keys: https://twitter.com/SchmiegSophie/status/1413502566797778948EAX mode: https://en.wikipedia.org/wiki/EAX_modeAES-GCM-SIV: https://en.wikipedia.org/wiki/AES-GCM-SIVDeterministic AEADs: https://github.com/google/tink/blob/master/docs/PRIMITIVES.md#deterministic-authenticated-encryption-with-associated-dataThai Duong: https://twitter.com/XorNinjaAWS-SDK Vuln: https://twitter.com/XorNinja/status/1310587707605659649"Security Cryptography Whatever" is hosted by Deirdre Connolly (@durumcrustulum), Thomas Ptacek (@tqbf), and David Adrian (@davidcadrian)

Live from Amsterdam, it's cancellable crypto hot takes! A fun little meme, plus a preview of the Real World Crypto program!Transcript: https://securitycryptographywhatever.com/2022/04/12/cancellable-crypto-takes-and-real-world-crypto/Links:Tony's twete: https://twitter.com/bascule/status/1512539700220805124Real World Crypto 2022: https://rwc.iacr.org/2022Merch! https://merch.scwpodcast.comFind us at:https://twitter.com/scwpodhttps://twitter.com/durumcrustulumhttps://twitter.com/tqbfhttps://twitter.com/davidcadrian"Security Cryptography Whatever" is hosted by Deirdre Connolly (@durumcrustulum), Thomas Ptacek (@tqbf), and David Adrian (@davidcadrian)