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dguido's profile
Dan Guido
Dan Guido
Dan Guido
@dguido

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Dan Guido

@dguido

CEO @trailofbits, organizer @EmpireHacking, director @hack_secure. Open DMs.

Brooklyn, NY
trailofbits.com
Joined April 2008

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    1. Yevgeniy Vahlis‏ @evahlis 3 Jan 2017
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      Good progress by @trailofbits on resolving the MITM threat model gap in algo VPN. http://bit.ly/2iuRPNb 

      1 reply 0 retweets 0 likes
    2. Dan Guido‏ @dguido 3 Jan 2017
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      Replying to @evahlis

      I think you're misreading, that issue has to do with a server being compromised and its keys being stolen. You're f'd either way.

      2 replies 0 retweets 0 likes
    3. Yevgeniy Vahlis‏ @evahlis 3 Jan 2017
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      Replying to @dguido

      then if the server private key is compromised you're screwed. Never storing the private key seems promising

      1 reply 0 retweets 0 likes
    4. Dan Guido‏ @dguido 3 Jan 2017
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      Replying to @evahlis

      Compromising the server private key requires compromising the entire server. Even if you protect the key, you're still fucked.

      1 reply 0 retweets 0 likes
    5. Yevgeniy Vahlis‏ @evahlis 3 Jan 2017
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      Replying to @dguido

      does the server use the private key? If it does then i get it

      1 reply 0 retweets 0 likes
      Dan Guido‏ @dguido 3 Jan 2017
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      Replying to @evahlis

      It's only needed to gen certs for new users. Today: if you don't use that feature, then it'll never be decrypted and exposed.

      6:30 AM - 3 Jan 2017
      2 replies 0 retweets 0 likes
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        1. Yevgeniy Vahlis‏ @evahlis 3 Jan 2017
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          Replying to @dguido

          that's what I thought re being used for user creation. I'd say having a compromised root CA is worse than someone controlling VPS

          1 reply 0 retweets 0 likes
        2. Yevgeniy Vahlis‏ @evahlis 3 Jan 2017
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          Replying to @evahlis @dguido

          bad CA means non-pinned certs can now be faked. Arguably you shouldn't trust your VPS too much anyway since 3rd party controls it

          1 reply 0 retweets 0 likes
        3. 2 more replies
        1. Dan Guido‏ @dguido 3 Jan 2017
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          Replying to @dguido @evahlis

          However this distracts from my point. Protecting the CA key is useful but if an attacker 0wns your VPS you have bigger problems.

          0 replies 0 retweets 0 likes
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