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Thomas Ptacek

Deirdre Connolly

David Adrian

Some cryptography & security people talk about security, cryptography, and whatever else is happening.

Security Cryptography Whatever

Nothing we have ever recorded on SCW has brought so much joy to
David. However, at several points during the episode, we may have witnessed Matthew Green's soul leave his body.

Our esteemed guests Justin Schuh and Matt Green joined us to debate whether `Dual_EC_DRBG` was intentionally backdoored by the NSA or 'just' a major fuckup.

Transcript: https://securitycryptographywhatever.com/2024/12/07/dual-ec-drbg

Links:

- Dicky George at InfiltrateCon 2014, 'Life at Both Ends of the Barrel - An NSA Targeting Retrospective': [https://youtu.be/qq-LCyRp6bU?si=MyTBKomkIVaxSy1Q](https://youtu.be/qq-LCyRp6bU?si=MyTBKomkIVaxSy1Q)
- Dicky George: [https://www.nsa.gov/Press-Room/Digital-Media-Center/Biographies/Biography-View-Page/Article/3330261/richard-dickie-george/](https://www.nsa.gov/Press-Room/Digital-Media-Center/Biographies/Biography-View-Page/Article/3330261/richard-dickie-george/)
- NYTimes on Sigint Enabling Project: [https://archive.nytimes.com/www.nytimes.com/interactive/2013/09/05/us/documents-reveal-nsa-campaign-against-encryption.html](https://archive.nytimes.com/www.nytimes.com/interactive/2013/09/05/us/documents-reveal-nsa-campaign-against-encryption.html)
- On the Practical Exploitability of Dual EC
in TLS Implementations: [https://www.usenix.org/system/files/conference/usenixsecurity14/sec14-paper-checkoway.pdf](https://www.usenix.org/system/files/conference/usenixsecurity14/sec14-paper-checkoway.pdf)
- Wired - Researchers Solve Juniper Backdoor Mystery; Signs Point to NSA [https://www.wired.com/2015/12/researchers-solve-the-juniper-mystery-and-they-say-its-partially-the-nsas-fault/](https://www.wired.com/2015/12/researchers-solve-the-juniper-mystery-and-they-say-its-partially-the-nsas-fault/)
- ProPublica - Revealed: The NSA's Secret Campaign to Crack, Undermine Internet Security [https://www.propublica.org/article/the-nsas-secret-campaign-to-crack-undermine-internet-encryption](https://www.propublica.org/article/the-nsas-secret-campaign-to-crack-undermine-internet-encryption)
- DDoSecrets - Sigint Enabling Project: [https://data.ddosecrets.com/Snowden%20archive/sigint-enabling-project.pdf](https://data.ddosecrets.com/Snowden%20archive/sigint-enabling-project.pdf)
- IAD: [https://www.iad.gov/](https://www.iad.gov/)
- Ars Technica - “Unauthorized code” in Juniper firewalls decrypts encrypted VPN traffic: [https://web.archive.org/web/20151222023311/http://arstechnica.com/security/2015/12/unauthorized-code-in-juniper-firewalls-decrypts-encrypted-vpn-traffic/](https://web.archive.org/web/20151222023311/http://arstechnica.com/security/2015/12/unauthorized-code-in-juniper-firewalls-decrypts-encrypted-vpn-traffic/)
- 2015 IMPORTANT JUNIPER SECURITY ANNOUNCEMENT: [https://web.archive.org/web/20151221171526/http://forums.juniper.net/t5/Security-Incident-Response/Important-Announcement-about-ScreenOS/ba-p/285554](https://web.archive.org/web/20151221171526/http://forums.juniper.net/t5/Security-Incident-Response/Important-Announcement-about-ScreenOS/ba-p/285554)
- Extended Random Values for TLS: [https://datatracker.ietf.org/doc/html/draft-rescorla-tls-extended-random-00](https://datatracker.ietf.org/doc/html/draft-rescorla-tls-extended-random-00)
- The Art of Software Security Assessment: [https://www.amazon.com/Art-Software-Security-Assessment-Vulnerabilities/dp/0321444426](https://www.amazon.com/Art-Software-Security-Assessment-Vulnerabilities/dp/0321444426)

"Security Cryptography Whatever" is hosted by Deirdre Connolly (@durumcrustulum), Thomas Ptacek (@tqbf), and David Adrian (@davidcadrian)

Dual_EC_DRBG with Justin Schuh and Matthew Green

THE QUANTUM COMPUTERS ARE COMING...right? We got Samuel Jacques and John Schanck at short notice to answer that question plus a bunch of other about error correcting codes, logical qubits, T-gates, and more about Google's new quantum computer Willow.

Transcript: https://securitycryptographywhatever.com/2024/12/18/quantum-willow

Links:

- https://blog.google/technology/research/google-willow-quantum-chip/ 
- https://research.google/blog/making-quantum-error-correction-work/
- https://blog.google/technology/google-deepmind/alphaqubit-quantum-error-correction/ 
- https://www.nature.com/articles/s41586-024-08449-y
- Sam’s ‘Landscape of Quantum Computing’ chart: https://sam-jaques.appspot.com/quantum\_landscape\_2024 
- The above, originally published in 2021: https://sam-jaques.appspot.com/quantum\_landscape
- https://sam-jaques.appspot.com
- https://jmschanck.info/

"Security Cryptography Whatever" is hosted by Deirdre Connolly (@durumcrustulum), Thomas Ptacek (@tqbf), and David Adrian (@davidcadrian)

Quantum Willow with John Schanck and Samuel Jacques

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/durumcrustulum
https://twitter.com/tqbf 
https://twitter.com/davidcadrian

"Security Cryptography Whatever" is hosted by Deirdre Connolly (@durumcrustulum), Thomas Ptacek (@tqbf), and David Adrian (@davidcadrian)

NSO group, Pegasus, Zero-Days, i(OS|Message) security

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-cryptanalysis
https://arxiv.org/pdf/2107.04940.pdf
https://ristretto.group
https://filippo.io/heartbleed

Find us at:
https://twitter.com/durumcrustulum
https://twitter.com/tqbf 
https://twitter.com/davidcadrian

"Security Cryptography Whatever" is hosted by Deirdre Connolly (@durumcrustulum), Thomas Ptacek (@tqbf), and David Adrian (@davidcadrian)

The Great "Roll Your Own Crypto" Debate with Filippo Valsorda

🔥JWT🔥

We talk about all sorts of tokens: JWT, PASETO, Protobuf Tokens, Macaroons, and Biscuits. With the great Jonathan Rudenberg!

After we recorded this, Thomas went deep on tokens even beyond what we talked about here: https://fly.io/blog/api-tokens-a-tedious-survey/

Transcript: https://securitycryptographywhatever.com/2021/08/12/what-do-we-do-about-jwt-with-jonathan-rudenberg/

Find us at:
https://twitter.com/durumcrustulum
https://twitter.com/tqbf
https://twitter.com/davidcadrian
https://twitter.com/scwpod

"Security Cryptography Whatever" is hosted by Deirdre Connolly (@durumcrustulum), Thomas Ptacek (@tqbf), and David Adrian (@davidcadrian)

What do we do about JWT? with Jonathan Rudenberg

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/scwpod
https://twitter.com/durumcrustulum
https://twitter.com/tqbf
https://twitter.com/davidcadrian

"Security Cryptography Whatever" is hosted by Deirdre Connolly (@durumcrustulum), Thomas Ptacek (@tqbf), and David Adrian (@davidcadrian)

Platform Security Part Deux with Justin Schuh

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/scwpod
https://twitter.com/durumcrustulum
https://twitter.com/tqbf
https://twitter.com/davidcadrian

Links:
https://www.apple.com/child-safety/pdf/CSAM_Detection_Technical_Summary.pdf

https://www.apple.com/child-safety/pdf/Apple_PSI_System_Security_Protocol_and_Analysis.pdf

https://www.law.cornell.edu/uscode/text/18/2258A

https://www.missingkids.org/content/dam/missingkids/gethelp/2020-reports-by-esp.pdf

https://www.reuters.com/article/us-apple-fbi-icloud-exclusive/exclusive-apple-dropped-plan-for-encrypting-backups-after-fbi-complained-sources-idUSKBN1ZK1CT

https://en.wikipedia.org/wiki/The_purpose_of_a_system_is_what_it_does

https://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.html

https://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)

Apple's CSAM Detection with Matthew Green

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/scwpod
https://twitter.com/durumcrustulum
https://twitter.com/tqbf
https://twitter.com/davidcadrian

"Security Cryptography Whatever" is hosted by Deirdre Connolly (@durumcrustulum), Thomas Ptacek (@tqbf), and David Adrian (@davidcadrian)

How to be a Certificate Authority with Ryan Sleevi

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/scwpod
https://twitter.com/durumcrustulum
https://twitter.com/tqbf
https://twitter.com/davidcadrian

Links!
The accuvant story in MIT Technology Review
All the Apple platforms patched FORCEDENTRY no-click 0-day
Chrome patched some 0-days that were being exploited in the wild
PASETO update 

"Security Cryptography Whatever" is hosted by Deirdre Connolly (@durumcrustulum), Thomas Ptacek (@tqbf), and David Adrian (@davidcadrian)

"Patch, Damnit!"

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)

PAKEs, oPRFs, algebra with George Tankersley

We're back! Signal rolled out a protocol change to be post-quantum resilient! Someone was caught intercepting Jabber TLS via certificate transparency! Was the same-origin policy in web browers just a dirty hack all along? Plus secure message format formalisms, and even more beating of the dead horse that is E2EE in the browser.

Transcript: https://securitycryptographywhatever.com/2023/11/07/PQXDH-etc

Links:

- https://zfnd.org/so-you-want-to-build-an-end-to-end-encrypted-web-app/
- https://github.com/superfly/macaroon
- https://cryspen.com/post/pqxdh/
- https://eprint.iacr.org/2023/1390.pdf

"Security Cryptography Whatever" is hosted by Deirdre Connolly (@durumcrustulum), Thomas Ptacek (@tqbf), and David Adrian (@davidcadrian)

Signal's Post-Quantum PQXDH, Same-Origin Policy, E2EE in the Browser Revisted

Signal's Post-Quantum PQXDH, Same-Origin Policy, E2EE in the Browser Revisted

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