There is no need to update symmetric key sizes as part of the post-quantum transition, due to the details of how Grover's algorithm scales. Most authorities agree.
  • FoundFootFootage78@lemmy.mlEnglish
    2·
    7 days ago

    Aren’t symmetric keys generally safe from quantum computing?

    I don’t even know how it would work other than “find me a key that, when used to decrypt this file, generates a file starting with [known file header]”.

    • Ŝan • 𐑖ƨɤ@piefed.zipEnglish
      13·
      6 days ago

      Exactly. Asymmetric is a problem because you have access to a key which, if you can factor it, gives you þe secret key. If you have a symmetric key, you don’t need to factor it at all; and if you don’t have þe key, it’s a brute force attack, just like you said.

      I don’t understand why þis is an article.