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Frank
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@jedisct1

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Frank

@jedisct1

France
Joined November 2008

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    1. Dmitry Chestnykh‏ @dchest 16 Oct 2017
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      GCM and many new AEs are less safe than most older AE due to nonce reuse making forgeries possible. And we’re adopting it everywhere.pic.twitter.com/t9pnzvvdcM

      2 replies 3 retweets 1 like
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    2. Dmitry Chestnykh‏ @dchest 16 Oct 2017
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      We knew how to make MAC not depend on nonce and then created AE constructions that do depend on it for performance reasons.

      1 reply 0 retweets 0 likes
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    3. Dmitry Chestnykh‏ @dchest 16 Oct 2017
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      Usual argument is that if nonce is repeated, protocol or implementation is badly designed.

      1 reply 0 retweets 0 likes
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    4. Dmitry Chestnykh‏ @dchest 16 Oct 2017
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      Are seatbelts and airbags unnecessary if all drivers drive carefully?

      2 replies 0 retweets 0 likes
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    5. Dmitry Chestnykh‏ @dchest 16 Oct 2017
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      We know from practice that many protocols are badly designed, and implementations suck. Crypto primitives should be designed for that.

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    6. Dmitry Chestnykh‏ @dchest 16 Oct 2017
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      I hope nonce-misuse resistant crypto is the future. I’m happy to see more of it recently: NORX and Farfalle specify such mode, GCM-SIV.

      1 reply 0 retweets 1 like
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      Frank‏ @jedisct1 16 Oct 2017
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      Replying to @dchest

      Nod. But it may help to call this property “nonce-reuse resistance” instead of “nonce-misuse”.

      3:26 AM - 16 Oct 2017
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      • Barbara Procida Dmitry Chestnykh
      3 replies 0 retweets 2 likes
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        2. Frank‏ @jedisct1 16 Oct 2017
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          Replying to @jedisct1 @dchest

          We should also focus less on performance. This is the main metric used everywhere to compare ciphers, yet it’s irrelevant in most cases.

          1 reply 1 retweet 0 likes
        3. Frank‏ @jedisct1 16 Oct 2017
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          Replying to @jedisct1 @dchest

          If you’re new to crypto, the first thing you’re going to stumble upon is tables comparing ciphers performance.

          1 reply 1 retweet 0 likes
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        2. Dmitry Chestnykh‏ @dchest 16 Oct 2017
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          Replying to @jedisct1

          Indeed.

          1 reply 0 retweets 0 likes
        3. Frank‏ @jedisct1 16 Oct 2017
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          Replying to @dchest

          If developers have to choose between “idiot-proof” and “regular”, they will pick the later. The first one is insulting.

          0 replies 0 retweets 1 like
        4. End of conversation
        1. Frank‏ @jedisct1 16 Oct 2017
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          Replying to @jedisct1 @dchest

          “misuse-resistant” can be perceived as “idiot proof”.

          0 replies 0 retweets 0 likes
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