Security Cryptography Whatever

A conversation that started with PAKEs (password-authenticated key exchanges) and touched on some cool math things: PRFs, finite fields, elliptic curve groups, anonymity protocols, hashing to curve groups, prime order groups, and more. With special guest, George Tankersley!Transcript: https://securitycryptographywhatever.com/2021/10/26/pakes-oprfs-algebra-with-george-tankersley/Links: SRP deprecation: https://blog.cryptographyengineering.com/should-you-use-srpOPAQUE: https://www.ietf.org/id/draft-irtf-cfrg-opaque-06.htmlobfs: https://github.com/shadowsocks/simple-obfsElligator: https://elligator.cr.yp.toHash to Curve: https://www.ietf.org/archive/id/draft-irtf-cfrg-hash-to-curve-12.htmlMagic Wormhole: https://github.com/magic-wormhole/magic-wormholeBiscuits: https://github.com/CleverCloud/biscuitRistretto: https://ristretto.groupMonero signature bug: https://www.getmonero.org/ru/2017/05/17/disclosure-of-a-major-bug-in-cryptonote-based-currencies.htmlSIDH smooth-order supersingular curves: https://link.springer.com/chapter/10.1007/978-3-662-53018-4_21"Security Cryptography Whatever" is hosted by Deirdre Connolly (@durumcrustulum), Thomas Ptacek (@tqbf), and David Adrian (@davidcadrian)

A lot of fixes got pushed in the past week! Please apply your updates! Apple, Chrome, Matrix, Azure, and more nonsense.Transcript:https://securitycryptographywhatever.com/2021/09/20/patch-damnit/Find us at:https://twitter.com/scwpodhttps://twitter.com/durumcrustulumhttps://twitter.com/tqbfhttps://twitter.com/davidcadrianLinks!The accuvant story in MIT Technology ReviewAll the Apple platforms patched FORCEDENTRY no-click 0-dayChrome patched some 0-days that were being exploited in the wildPASETO update "Security Cryptography Whatever" is hosted by Deirdre Connolly (@durumcrustulum), Thomas Ptacek (@tqbf), and David Adrian (@davidcadrian)

Not the hero the internet deserves, but the one we need: it's Ryan Sleevi!We get into the weeds on becoming a certificate authority, auditing said authorities, DNSSEC, DANE, taking over country code top level domains, Luxembourg, X.509, ASN.1, CBOR, more JSON (!), ACME, Let's Encrypt, and more, on this extra lorge episode with the web PKI's Batman.Transcript: https://securitycryptographywhatever.com/2021/09/06/how-to-be-a-certificate-authority-with-ryan-sleevi/Find 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)

We're talking about Apple's new proposed client-side CSAM detection system. We weren't sure if we were going to cover this, and then we realized that not all of us have been paying super close attention to what the hell this thing is, and have a lot of questions about it. So we're talking about it, with our special guest Professor Matthew Green.We cover how Apple's system works, what it does (and doesn't), where we have unanswered questions, and where some of the gaps are.Transcript: https://securitycryptographywhatever.com/2021/08/27/apple-s-csam-detection-with-matthew-green/Find us at:https://twitter.com/scwpodhttps://twitter.com/durumcrustulumhttps://twitter.com/tqbfhttps://twitter.com/davidcadrianLinks:https://www.apple.com/child-safety/pdf/CSAM_Detection_Technical_Summary.pdfhttps://www.apple.com/child-safety/pdf/Apple_PSI_System_Security_Protocol_and_Analysis.pdfhttps://www.law.cornell.edu/uscode/text/18/2258Ahttps://www.missingkids.org/content/dam/missingkids/gethelp/2020-reports-by-esp.pdfhttps://www.reuters.com/article/us-apple-fbi-icloud-exclusive/exclusive-apple-dropped-plan-for-encrypting-backups-after-fbi-complained-sources-idUSKBN1ZK1CThttps://en.wikipedia.org/wiki/The_purpose_of_a_system_is_what_it_doeshttps://research.fb.com/blog/2021/02/understanding-the-intentions-of-child-sexual-abuse-material-csam-sharers/https://www.nytimes.com/interactive/2019/11/09/us/internet-child-sex-abuse.htmlhttps://www.apple.com/child-safety/pdf/Expanded_Protections_for_Children_Frequently_Asked_Questions.pdf"Security Cryptography Whatever" is hosted by Deirdre Connolly (@durumcrustulum), Thomas Ptacek (@tqbf), and David Adrian (@davidcadrian)

We did not run out of things to talk about: Chrome vs. Safari vs. Firefox. Rust vs. C++. Bug bounties vs. exploit development. The Peace Corps vs. The Marine Corps.Transcript: https://securitycryptographywhatever.com/2021/08/21/platform-security-part-deux-with-justin-schuh/Find 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)

Join Jonathan Rudenberg, a seasoned software engineer known for his work on Flynn and various authentication systems, as he dives deep into the world of tokens. He discusses the enduring relevance of JSON Web Tokens (JWT), critiques their security vulnerabilities, and compares them with other protocols like SAML and OIDC. Rudenberg also introduces alternatives like Peseto and macaroons, highlighting their unique advantages. Learn about the intricate challenges of certificate management in large organizations, and discover the future possibilities in token authentication!

Special guest Filippo Valsorda joins us to debate with Thomas on whether one should or should not "roll your own crypto", and how to produce better cryptography in general.After we recorded this, David went even deeper  on 'rolling your own crypto' in a blog post here: https://dadrian.io/blog/posts/roll-your-own-crypto/Transcript: https://securitycryptographywhatever.com/2021/07/31/the-great-roll-your-own-crypto-debate-with-filippo-valsorda/Links:https://peter.website/meow-hash-cryptanalysishttps://arxiv.org/pdf/2107.04940.pdfhttps://ristretto.grouphttps://filippo.io/heartbleedFind us at:https://twitter.com/durumcrustulumhttps://twitter.com/tqbf https://twitter.com/davidcadrian"Security Cryptography Whatever" is hosted by Deirdre Connolly (@durumcrustulum), Thomas Ptacek (@tqbf), and David Adrian (@davidcadrian)

Deirdre, Thomas and David talk about NSO group, Pegasus,  whether iOS a burning trash fire, the zero-day market, and whether rewriting all of iOS in Swift is a viable strategy for reducing all these vulns.Transcript: https://securitycryptographywhatever.com/2021/07/26/nso-group-pegasus-zero-days-i-os-message-security/Find us at:https://twitter.com/durumcrustulumhttps://twitter.com/tqbf https://twitter.com/davidcadrian"Security Cryptography Whatever" is hosted by Deirdre Connolly (@durumcrustulum), Thomas Ptacek (@tqbf), and David Adrian (@davidcadrian)