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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.  👼Ąż杏‏ @angealbertini 14 Jun 2017
      Replying to @BRIAN_____ @Serianox_

      https://biterrant.io/ 

      2 replies 2 retweets 3 likes
    2. Khanzerbero‏ @Khanzerbero 14 Jun 2017
      Replying to @angealbertini @BRIAN_____ @Serianox_

      Should we Expect this to be weaponized soon @BitTorrent think about someone injecting garbage? quick and easy disruption.

      1 reply 0 retweets 0 likes
    3. Allan Wirth‏ @Allan_Wirth 14 Jun 2017
      Replying to @Khanzerbero @angealbertini and

      With a collision attack, the torrent author can craft a specific torrents where there are multiple valid download results. That's it.

      1 reply 0 retweets 0 likes
    4. Allan Wirth‏ @Allan_Wirth 14 Jun 2017
      Replying to @Allan_Wirth @Khanzerbero and

      In the biterrant.io example (downloading an exe) you were already trusting the torrent author anyway. They'd need to be "in on it" for this.

      1 reply 0 retweets 0 likes
      Brian Smith‏ @BRIAN_____ 14 Jun 2017
      Replying to @Allan_Wirth @Khanzerbero and

      1. Malicious torrent author shares file. 2. Somebody (e.g. anti-virus service) verifies original. 3. Victim downloads substituted chunks.

      8:17 PM - 14 Jun 2017
      • 1 Like
      • Allan Wirth
      1 reply 0 retweets 1 like
        1. New conversation
        2. Allan Wirth‏ @Allan_Wirth 14 Jun 2017
          Replying to @BRIAN_____ @Khanzerbero and

          Hmmm... yeah that would definitely work and be (potentially) practical. I suppose torrent clients could use hardened sha1?

          2 replies 0 retweets 0 likes
        3. Brian Smith‏ @BRIAN_____ 14 Jun 2017
          Replying to @Allan_Wirth @Khanzerbero and

          Hardened SHA-1 only protects against one trick that reduces the cost of collisions, right? Likely many other tricks that aren't public.

          2 replies 0 retweets 0 likes
        4. Allan Wirth‏ @Allan_Wirth 14 Jun 2017
          Replying to @BRIAN_____ @Khanzerbero and

          Right. It's a short-term mitigation.

          0 replies 0 retweets 0 likes
        5. End of conversation

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