Vincent RAMPAL

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    Vincent RAMPAL commented  · 

    Post quantum cryptography will affect Proton both for data at rest and data in transit.
    I see your plan for GPG encryption quantum safe but could you please clarify for TLS/QUIC and certificates ?

    Proton use encryption at different level:
    * when Proton exchange mails with other mail servers (encryption in transit)
    * when Proton verify the identity of other mail servers (certificate / signature)
    * when Proton store mails using GPG (encryption at rest)
    * when user connects to Proton servers (encryption in transit)
    * when user verifies the identity of Proton servers (certificate / signature)
    All of them needs to support post-quantum cryptography.

    Post quantum crypto is supported in GPG since version 2.5.1.
    Source: https://lists.gnupg.org/pipermail/gnupg-announce/2024q3/000485.html

    NIST offer several standard of post quantum crypto.
    Source: https://csrc.nist.gov/projects/post-quantum-cryptography/post-quantum-cryptography-standardization

    Open Quantum Safe is also provide several solutions.
    Project: https://openquantumsafe.org/
    Presentations: https://www.douglas.stebila.ca/research/presentations/

    Cloudflare is quite active on this topic and you can use it as a reference to see if you are above or bellow competition.
    https://www.cloudflare.com/pqc/
    https://blog.cloudflare.com/pq-2024/
    https://pq.cloudflareresearch.com/

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