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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. Matthew Green‏ @matthew_d_green 5 Sep 2013
      Replying to @cryptolicious

      @cryptolicious The problem with the Guardian quote is that now we actually have to speculate about this. It would be better if we didn't.

      2 replies 0 retweets 0 likes
    2. Steven Myers‏ @cryptolicious 5 Sep 2013
      Replying to @matthew_d_green

      @matthew_d_green Well I also don't believe they stopped after 2006. My view is anything after that date is likely problematic. Read SHA3.

      1 reply 0 retweets 0 likes
    3. Matthew Green‏ @matthew_d_green 5 Sep 2013
      Replying to @cryptolicious

      @cryptolicious Well, if Dual-EC was the extent of their capabilities, there's not much to worry about. But if other standards are hosed...

      1 reply 0 retweets 0 likes
    4. Matthew Green‏ @matthew_d_green 5 Sep 2013
      Replying to @matthew_d_green

      @cryptolicious Have you ever looked at those other PRNGs? They're based on 'trustworthy' primitives (SHA, AES, HMAC). But so complicated!

      1 reply 0 retweets 0 likes
    5. Steven Myers‏ @cryptolicious 5 Sep 2013
      Replying to @matthew_d_green

      @matthew_d_green No I haven't looked at them. What is wrong with the simple use of a block cipher F_k(0),...,F_k(i)?

      1 reply 0 retweets 0 likes
    6. Matthew Green‏ @matthew_d_green 5 Sep 2013
      Replying to @cryptolicious

      @cryptolicious Something to do with state compromise.

      2 replies 0 retweets 0 likes
    7. Matthew Green‏ @matthew_d_green 5 Sep 2013
      Replying to @matthew_d_green

      @cryptolicious I don't have a perfect reference that talks about the design goals for NIST PRNGs, but I do know of papers on the subject.

      1 reply 0 retweets 0 likes
    8. Matthew Green‏ @matthew_d_green 5 Sep 2013
      Replying to @matthew_d_green

      @cryptolicious For example: http://eprint.iacr.org/2013/338  talks about 'robustness' notions in the context of the Linux PRNG.

      1 reply 0 retweets 0 likes
    9. Steven Myers‏ @cryptolicious 5 Sep 2013
      Replying to @matthew_d_green

      @matthew_d_green Ok, so the construction is not the problem, it is that we're feeding biased random bits. That I can understand.

      2 replies 0 retweets 0 likes
    10. Steven Myers‏ @cryptolicious 5 Sep 2013
      Replying to @cryptolicious

      @matthew_d_green Should we trust Intel's new RNGs on chips?

      6 replies 7 retweets 1 like
      Brian Smith‏ @BRIAN_____ 5 Sep 2013
      Replying to @cryptolicious

      @cryptolicious @matthew_d_green Most software doesn't have a need to trust Intel's PRNG, but its output is useful to mix into another PRNG.

      6:51 PM - 5 Sep 2013
      1 reply 0 retweets 0 likes
        1. New conversation
        2. Matthew Green‏ @matthew_d_green 5 Sep 2013
          Replying to @BRIAN_____

          @BRIAN_____ @cryptolicious On some systems with limited entropy sources, that could turn it into the de-facto RNG.

          1 reply 0 retweets 0 likes
        3. Brian Smith‏ @BRIAN_____ 5 Sep 2013
          Replying to @matthew_d_green

          @matthew_d_green @cryptolicious Is that a realistic scenerio? If you follow a rule of "never trust any one source" you'll never get there.

          1 reply 0 retweets 0 likes
        4. Steven Myers‏ @cryptolicious 5 Sep 2013
          Replying to @BRIAN_____

          @BRIAN_____ @matthew_d_green Well, to make sure people don't screw up implementation, one woudl hope for one trusted entropy source.

          1 reply 0 retweets 0 likes
        5. Stefan Arentz  ☕️‏ @satefan 5 Sep 2013
          Replying to @cryptolicious

          @cryptolicious @BRIAN_____ @matthew_d_green Like the highly recommended Dual_EC_DRBG

          0 replies 0 retweets 0 likes
        6. End of conversation

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