23 votes

Quantum resistance and the Signal Protocol

2 comments

  1. adutchman
    Link
    Always good to see Signal is thinking ahead with their security

    Always good to see Signal is thinking ahead with their security

    3 votes
  2. aditya
    Link
    Just tried to submit this to ~comp, I always get thrown by ~tech vs ~comp. (Side note: I got a notice that this link was already submitted when in the past I've accidentally submitted duplicate...

    Just tried to submit this to ~comp, I always get thrown by ~tech vs ~comp. (Side note: I got a notice that this link was already submitted when in the past I've accidentally submitted duplicate topics, is that a new tildes feature?)

    Today we are happy to announce the first step in advancing quantum resistance for the Signal Protocol: an upgrade to the X3DH specification which we are calling PQXDH. With this upgrade, we are adding a layer of protection against the threat of a quantum computer being built in the future that is powerful enough to break current encryption standards.

    This post is written to introduce this work to non-experts, and will review what quantum computing is and the challenges it presents for current cryptographic algorithms, before providing a high level overview of how we are adapting our specifications to answer these challenges. If you would like to skip this summary and explore our PQXDH specification in depth, you can read our technical whitepaper here.

    Link to whitepaper: https://signal.org/docs/specifications/pqxdh/

    3 votes