Post-Quantum iMessage with Douglas Stebila

Apple iMessage is getting a big upgrade! Not only are they rolling out ratcheting, but they’re going post-quantum, AND they’re doing post-quantum ratcheting! Douglas Stebila joined us to talk about his security analysis of the new PQ3 protocol update and not indulge our wild Apple speculations:Transcript: https://securitycryptographywhatever.com/2024/03/03/post-quantum-imessage-with-douglas-stebila/Links:- https://security.apple.com/blog/imessage-pq3/- Security analysis of the iMessage PQ3 protocolhttps://security.apple.com/assets/files/A_Formal_Analysis_of_the_iMessage_PQ3_Messaging_Protocol_Basin_et_al.pdf- Ratcheting design: https://eprint.iacr.org/2024/220.pdf- When Messages are Keys: Is HMAC a dual-PRF?: https://eprint.iacr.org/2023/861.pdf- Real World Deniability in Messaging: https://eprint.iacr.org/2023/403.pdf- Padmé: https://www.petsymposium.org/2019/files/papers/issue4/popets-2019-0056.pdf- Max Headroom: https://www.youtube.com/watch?v=cYdpOjletnc- Extended Canetti-Krawczyk model: https://iacr.org/archive/eurocrypt2001/20450451.pdf- Douglas Stebila: https://www.douglas.stebila.ca/

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