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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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    Dan Guido‏ @dguido Sep 10

    The embargo has been lifted! @GeminiDotCom is launching a US regulator-approved, fiat-collateralized, ERC20 stablecoin: the Gemini dollar. I’m pleased to announce that @trailofbits completed a security review of it. You can find our public report here: https://gemini.com/dollar/trailofbits …

    6:26 AM - 10 Sep 2018
    • 52 Retweets
    • 151 Likes
    • JesperSellin Jared Harrill Sage James Hailey Lennon たい焼きお姉さん Joel@J2 Partners Winklevoss Capital Maddie Kartik Talwar
    4 replies 52 retweets 151 likes
      1. New conversation
      2. Dan Guido‏ @dguido Sep 10

        More resources about the Gemini dollar: Whitepaper: https://gemini.com/dollar/whitepaper … Gemini blog: https://medium.com/gemini/blog-post-draft-501882fb35a7 … Press release:https://www.businesswire.com/news/home/20180910005233/en/Gemini-Puts-U.S.-Dollars-Blockchain-Gemini-Dollar …

        1 reply 3 retweets 9 likes
        Show this thread
      3. Dan Guido‏ @dguido Sep 10

        Gemini studied known Ethereum risks, minimized complexity in their design, and developed a high-coverage symbolic test suite w/ Manticore all PRIOR to starting their review with us. We collaborated to mitigate more subtle risks during the review because they had prepared so well.

        1 reply 0 retweets 8 likes
        Show this thread
      4. Dan Guido‏ @dguido Sep 10

        Further, our upcoming advice on smart contract upgrades is based in part on discussions we had with Gemini earlier this summer. We’ll be publishing those recommendations later this month but, for now, here are pitfalls to avoid:https://blog.trailofbits.com/2018/09/05/contract-upgrade-anti-patterns/ …

        1 reply 1 retweet 8 likes
        Show this thread
      5. Dan Guido‏ @dguido Sep 10

        We were pleased to work w/ Gemini on this project. We hope that more teams follow their example! Study the risks: https://github.com/trailofbits/not-so-smart-contracts … Bug check the code: https://github.com/trailofbits/slither … Write property tests: https://github.com/trailofbits/echidna … Verify the final product:https://github.com/trailofbits/manticore …

        1 reply 7 retweets 33 likes
        Show this thread
      6. Dan Guido‏ @dguido Sep 10

        Even the most prepared, reviewed, and tested code can have bugs. If you find any in the @GeminiDotCom dollar or related systems, contact them via their security page: https://gemini.com/security/  (we wish more people copied them here, too!)https://github.com/trailofbits/blockchain-security-contacts …

        1 reply 2 retweets 10 likes
        Show this thread
      7. End of conversation
      1. New conversation
      2. zooko‏ @zooko Sep 10
        Replying to @dguido @GeminiDotCom @trailofbits

        Is the complete report showing the issues you discovered available?

        1 reply 0 retweets 0 likes
      3. Dan Guido‏ @dguido Sep 10
        Replying to @zooko @GeminiDotCom @trailofbits

        Nope! All the pertinent details are in the public doc. We’re extracting some lessons learned into guidance for our blog.

        1 reply 0 retweets 1 like
      4. zooko‏ @zooko Sep 10
        Replying to @dguido @GeminiDotCom @trailofbits

        Ok! So this one-pager is it? https://gemini.com/wp-content/themes/gemini/assets/img/dollar/gemini-dollar-trailofbits-audit.pdf …

        1 reply 0 retweets 2 likes
      5. Dan Guido‏ @dguido Sep 10
        Replying to @zooko @GeminiDotCom @trailofbits

        Yep! It’s got engagement length, # of consultants, exact dates, engagement goals, level of access, testing techniques, bugs found, and retest status.

        3 replies 0 retweets 1 like
      6. Dan Guido‏ @dguido Sep 10
        Replying to @dguido @zooko and

        Ultimately it is the client’s decision what to release if anything at all, not mine. However, I think this high-level report communicates the most important information I’d want to know as a user.

        0 replies 0 retweets 1 like
      7. End of conversation
      1. Doctor ₿ Goss, MD‏ @_drgo Sep 10
        Replying to @dguido @tylerwinklevoss and

        Did your review include network congestion handling? Might all be for naught if nobody can sync a node.

        0 replies 0 retweets 1 like
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      1. Donar Alofs‏ @donaralofs Sep 11
        Replying to @dguido @tylerwinklevoss and

        YouTube should have adviseren Them to use the Syscoin blockchain, Gasteren, cheaper to use, API's that are very good and easy to use. More info: http://syscoin.network/syslinks 

        0 replies 0 retweets 0 likes
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