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BRIAN_____'s profile
Brian Smith
Brian Smith
Brian Smith
@BRIAN_____

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Brian Smith

@BRIAN_____

Code farmer. Security, crypto, performance, networking, usability. Rust, C++, C, Haskell, DSLs, etc. *ring*, webpki, crypto-bench, mozilla::pkix.

Honolulu & San Francisco
briansmith.org
Joined April 2008

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    1. Antonio Sanso‏Verified account @asanso Oct 24

      Hey Crypto Twitterland. #Kubernetes prefers AES CBC (without HMAC!!) over AES GCM for encryption at rest (probably the fear the AES GCM forbidden attack, see the rotation note). Do you agree? https://kubernetes.io/docs/tasks/administer-cluster/encrypt-data/ …

      10 replies 6 retweets 10 likes
    2. hanno‏ @hanno Oct 24
      Replying to @asanso

      the forbidden attack recovers the authentication key, that wouldn't make sense. (I mean GCM with broken authentication is just as bad as CBC, not worse.) it's probably a case of "we should have better AEADs"...

      3 replies 0 retweets 6 likes
    3. hanno‏ @hanno Oct 24
      Replying to @hanno @asanso

      wait they already have xsalsa20, that seems like what they should use, right?

      1 reply 0 retweets 4 likes
    4. Antonio Sanso‏Verified account @asanso Oct 24
      Replying to @hanno

      apparently they put in a second position. Strong cs Strongest :)

      1 reply 0 retweets 2 likes
    5. hanno‏ @hanno Oct 24
      Replying to @asanso

      without having reviewed the use case my gut feeling tells me they should use xsalsa20 by default and mark both cbc and gcm as not recommended / deprecated

      1 reply 0 retweets 3 likes
    6. Antonio Sanso‏Verified account @asanso Oct 24
      Replying to @hanno

      I agree. @hashbreaker we really need a Caesar winner :D

      1 reply 0 retweets 0 likes
      Brian Smith‏ @BRIAN_____ Oct 24
      Replying to @asanso @hanno @hashbreaker

      Most likely they are constrained to preferring solutions that use FIPS-140-approved cryptography for business reasons.

      9:31 AM - 24 Oct 2018
      • 1 Like
      • Antonio Sanso
      2 replies 0 retweets 1 like
        1. New conversation
        2. hanno‏ @hanno Oct 24
          Replying to @BRIAN_____ @asanso @hashbreaker

          then make the default xsalsa and say "if you need a lower security level for fips compliance reasons chose this" for gcm.

          1 reply 0 retweets 1 like
        3. Brian Smith‏ @BRIAN_____ Oct 24
          Replying to @hanno @asanso @hashbreaker

          I suggest asking @smarterclayton who to talk to about it. I am surprised XSalsa is even an option in the first place (near-zero interoperability or compliance benefit), and I can't reverse-engineer the rationale for the other options provided either.

          0 replies 0 retweets 1 like
        4. End of conversation
        1. New conversation
        2. Scott Arciszewski‏ @CiPHPerCoder Oct 24
          Replying to @BRIAN_____ @asanso and

          How to grease the regulatory wheels to get X{Salsa20/20,ChaCha20}-Poly1305 + X25519 + Ed25519 approved for use in FIPS-140?

          1 reply 0 retweets 2 likes
        3. Kevin Jones 🏒 🏳️‍🌈 🦃‏ @vcsjones Oct 24
          Replying to @CiPHPerCoder @BRIAN_____ and

          Curve25519/448 is already in approval process, and X25519/448 "will be considered". NIST is aware of these algorithms, it's just a very slow process.https://csrc.nist.gov/News/2017/Transition-Plans-for-Key-Establishment-Schemes …

          1 reply 0 retweets 2 likes
        4. Scott Arciszewski‏ @CiPHPerCoder Oct 24
          Replying to @vcsjones @BRIAN_____ and

          I wonder if that includes Ed25519 support

          0 replies 0 retweets 1 like
        5. End of conversation

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