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bascule's profile
Tony Arcieri
Tony Arcieri
Tony Arcieri
@bascule

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Tony Arcieri

@bascule

Co-founder @iqlusioninc, formerly @square @chain. Cryptography dilettante, polyglot programmer, key management wrangler, and infrastructure security specialist

San Francisco, CA
tonyarcieri.com
Joined May 2007

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    1. Tony Arcieri‏ @bascule 8 Jun 2013

      @veorq are there any differences in the security properties of Blake2b keys versus personalization strings?

      1 reply 0 retweets 0 likes
    2. JP Aumasson‏ @veorq 8 Jun 2013
      Replying to @bascule

      @bascule personalization strings are assumed to be public or (semi) secret, but "less" secret than crypto keys, they are thus more exposed..

      1 reply 0 retweets 0 likes
    3. JP Aumasson‏ @veorq 8 Jun 2013
      Replying to @veorq

      @bascule in the sense that messages interact directly with the perso strings, but not with the key, because it is first "compressed"..

      1 reply 0 retweets 0 likes
    4. JP Aumasson‏ @veorq 8 Jun 2013
      Replying to @veorq

      @bascule that said, it might be safe to use secrets as perso strings, but we don't claim that it's as secure as the defined mode

      1 reply 0 retweets 0 likes
      Tony Arcieri‏ @bascule 8 Jun 2013
      Replying to @veorq

      @veorq I'm using a short string (in this case "block") as a key since @jedisct1 doesn't expose the personalization string API in libsodium

      12:27 PM - 8 Jun 2013
      1 reply 0 retweets 0 likes
        1. New conversation
        2. JP Aumasson‏ @veorq 8 Jun 2013
          Replying to @bascule

          @bascule ah, I presumed you intended to use the perso slot to key the hash more efficiently

          1 reply 0 retweets 0 likes
        3. Tony Arcieri‏ @bascule 8 Jun 2013
          Replying to @veorq

          @veorq I'd like to, API does not permit unfortunately. Otherwise that seems fine though, right?

          1 reply 0 retweets 0 likes
        4. JP Aumasson‏ @veorq 8 Jun 2013
          Replying to @bascule

          @bascule I don't see any obvious objection to that at the moment

          1 reply 0 retweets 0 likes
        5. Tony Arcieri‏ @bascule 8 Jun 2013
          Replying to @veorq

          @veorq cool, thanks

          0 replies 0 retweets 0 likes
        6. End of conversation

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