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colmmacc's profile
Colm MacCárthaigh
Colm MacCárthaigh
Colm MacCárthaigh
@colmmacc

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Colm MacCárthaigh

@colmmacc

AWS, Apache, Crypto, Irish Music, Haiku, Photography

Seattle
notesfromthesound.com
Joined April 2008

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    1. Colm MacCárthaigh‏ @colmmacc 27 Jun 2017
      • Report Tweet
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      Replying to @jedisct1 @tqbf

      I offered to PR a fork-safe DRBG that we've formally verified, but bad faith from poisonous lunatics on openssl-prng made me give up.

      3 replies 3 retweets 4 likes
    2. Rich Salz‏ @RichSalz 28 Jun 2017
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      Replying to @colmmacc @jedisct1 @tqbf

      I think it's a different world now. Please get in touch. And I'm sorry.

      2 replies 0 retweets 1 like
    3. Colm MacCárthaigh‏ @colmmacc 28 Jun 2017
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      Replying to @RichSalz @jedisct1 @tqbf

      Happy to go again. Is there a particularly good PR or Issue to put some observations/references/thoughts in?

      2 replies 0 retweets 1 like
    4. Colm MacCárthaigh‏ @colmmacc 28 Jun 2017
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      Replying to @colmmacc @RichSalz and

      I replied to the cryptography@ thread with links, proofs and rationale for the s2n design. You've been getting some undeserved hate there!

      1 reply 0 retweets 1 like
    5. Rich Salz‏ @RichSalz 28 Jun 2017
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      Replying to @colmmacc @jedisct1 @tqbf

      Look forward to reading your post. It wouldn't be the Internet without undeserved hate; I can handle it.

      1 reply 0 retweets 1 like
    6. Colm MacCárthaigh‏ @colmmacc 29 Jun 2017
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      Replying to @RichSalz @jedisct1 @tqbf

      http://www.metzdowd.com/pipermail/cryptography/2017-June/032361.html … for the twitter gallery.

      2 replies 0 retweets 1 like
    7. Thomas H. Ptacek‏ @tqbf 29 Jun 2017
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      Replying to @colmmacc @RichSalz @jedisct1

      Orthogonally: of the stuff you painstakingly verified for s2n’s RNG: which map to actual security failures in real CSPRNGs?

      1 reply 0 retweets 0 likes
    8. Colm MacCárthaigh‏ @colmmacc 29 Jun 2017
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      Replying to @tqbf @RichSalz @jedisct1

      I value our test cases ( https://github.com/awslabs/s2n/blob/master/tests/unit/s2n_random_test.c … ), and our state machine model much more highly, which tackle fork safety.

      2 replies 0 retweets 1 like
    9. Colm MacCárthaigh‏ @colmmacc 29 Jun 2017
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      Replying to @colmmacc @tqbf and

      For me the value of the formal proof is not having to repeat the millions of hours of randomness testing that has been done on AES_CTR_DRBG.

      2 replies 0 retweets 0 likes
    10. Thomas H. Ptacek‏ @tqbf 29 Jun 2017
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      Replying to @colmmacc @RichSalz @jedisct1

      You’ve lost me here. Why do we need randomness testing on CTR-DRBG? Do we believe AES to be broken?

      1 reply 0 retweets 0 likes
      Colm MacCárthaigh‏ @colmmacc 29 Jun 2017
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      Replying to @tqbf @RichSalz @jedisct1

      1: Circular logic problem. Proofs are nice, but actual hardcore randomness testing is a big reason to believe that AES isn't broken.

      10:53 AM - 29 Jun 2017
      1 reply 0 retweets 0 likes
        1. Colm MacCárthaigh‏ @colmmacc 29 Jun 2017
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          Replying to @colmmacc @tqbf and

          2. It's possible to make a DRBG construction, which uses AES, that isn't random. For example, zeroing the seed after a usage limit.

          0 replies 0 retweets 0 likes
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