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jedisct1's profile
Frank
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Frank
@jedisct1

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Frank

@jedisct1

France
Joined November 2008

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    1. Daniel LaBarge‏ @dalabarge 21 Dec 2018
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      • Report NetzDG Violation

      @CiPHPerCoder are you familiar with TLS-SRP in the latest OpenSSL and whether the old concerns of username leak are still merited? Looking to see if PHP's OpenSSL implementation can expose SRP and if so is it worth the effort?

      1 reply 0 retweets 0 likes
    2. Scott Arciszewski‏ @CiPHPerCoder 21 Dec 2018
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      Replying to @dalabarge

      I would ask @matthew_d_green who knows OpenSSL and SRP far better than I do. I'm more interested in projects like OPAQUE than legacy SRP.

      3 replies 0 retweets 0 likes
    3. Daniel LaBarge‏ @dalabarge 21 Dec 2018
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      Replying to @CiPHPerCoder @matthew_d_green

      Do you have comparison of the benefits of OPAQUE compared to SRP?

      2 replies 0 retweets 0 likes
    4. Steve‏ @Sc00bzT 21 Dec 2018
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      Replying to @dalabarge @CiPHPerCoder @matthew_d_green

      SRP with blind salt is one extra message back and forth than OPAQUE. Quantum computer resistance SRP: observe a successful exchange and solve a DLP for each pw guess. OPAQUE: solve a DLP and have standard offline pw guessing. Side note SPAKE2+EE is better than SRP6a.

      1 reply 0 retweets 2 likes
    5. Steve‏ @Sc00bzT 25 Dec 2018
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      Replying to @Sc00bzT @dalabarge and

      Steve Retweeted Steve

      I'm getting around to doing this (https://twitter.com/Sc00bzT/status/1073441426506162176 …) and I keep forgetting how SRP6a works so minor correction: "SRP with blind salt is the same number of messages as OPAQUE." Forgot to mention that OPAQUE and SPAKE2+EE can use elliptic curves and SRP can't.

      Steve added,

      Steve @Sc00bzT
      I like how I get 80% of the way through writing OPAQUE and I find out it sucks* and I'm stupid** for just now figuring that out. A "new" PAKE called "BSPAKE", code, test vectors, reasons, and blog are coming… "sometime". * Not really ** Eh a little bit
      1 reply 0 retweets 1 like
    6. Steve‏ @Sc00bzT 25 Dec 2018
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      Replying to @Sc00bzT @dalabarge and

      SPAKE2+EE with blind salt is still one extra message back and forth… depending on your use. It can be one extra message or even the same if client is the first to send data over the session or first to verify.

      2 replies 0 retweets 1 like
      Frank‏ @jedisct1 1 Jan 2019
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      Replying to @Sc00bzT @dalabarge and

      I’ll add salt blinding to my SPAKE2+EE implementation once libsodium 1.0.17 is officially released.

      6:48 AM - 1 Jan 2019 from Roilly, France
      • 1 Like
      • Steve
      1 reply 0 retweets 1 like
        1. Steve‏ @Sc00bzT 1 Jan 2019
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          Replying to @jedisct1 @dalabarge and

          P.S. blind with the inverse so you can test for 0: C: r = clamp(random()) C: P = hashtopoint(H(pw, userId, serverId)) // or whatever C: R = (1/r) * P C->S: R S: R' = clamp(salt) * R S: if R' == 0, abort C<-S: R' C: blindSalt = r * R' C: if blindSalt==0, abort

          0 replies 0 retweets 1 like
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