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marcan42's profile
Hector Martin
Hector Martin
Hector Martin
@marcan42

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Hector Martin

@marcan42

If it ain't broke, I'll fix it! I'm porting Linux to Apple Silicon Macs at @AsahiLinux. http://patreon.com/marcan  | http://github.com/sponsors/marcan 

Tokyo, Japan
marcan.st
Joined May 2009

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    1. Hector Martin‏ @marcan42 4 Aug 2017
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      I implemented @troyhunt's HIBP password list as a pure Python3 Bloom filter, in 629MB (false positive rate = 0.0005)https://gist.github.com/marcan/23e1ec416bf884dcd7f0e635ce5f2724 …

      5 replies 87 retweets 212 likes
    2. Hector Martin‏ @marcan42 4 Aug 2017
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      Replying to @marcan42 @troyhunt

      And this is how I will be using it in production, on the @euskalencounter reservations website. Comments welcome :)pic.twitter.com/al2DpM2z5P

      10 replies 25 retweets 80 likes
    3. Per Thorsheim‏Verified account @thorsheim 4 Aug 2017
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      Replying to @marcan42

      I would advice against using such a massive block list, top 1K-10K is enough, & implement other serverside features instead. Better UX.

      3 replies 1 retweet 6 likes
    4. Tomáš Hála‏ @tomashala 5 Aug 2017
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      Replying to @thorsheim @marcan42

      That interest me. You mean it is not good idea to ban setting any of public leaked passwords?

      1 reply 0 retweets 0 likes
    5. Per Thorsheim‏Verified account @thorsheim 5 Aug 2017
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      Replying to @tomashala @marcan42

      This is worthy of a paper, Twitter not sufficient. I imagine blocking 306 million pwds would cause massive customer loss & complaints.

      3 replies 2 retweets 4 likes
    6. PasswordResearch.com‏ @PwdRsch 5 Aug 2017
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      Replying to @thorsheim @tomashala @marcan42

      Password Creation in the Presence of Blacklists, USEC '17, http://www.passwordresearch.com/papers/paper650.html … Didn't measure such a large blacklist though.

      1 reply 4 retweets 9 likes
    7. Royce Williams‏ @TychoTithonus 5 Aug 2017
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      Replying to @PwdRsch @thorsheim and

      And based on the 99.2% of Hunt's hashes I've cracked so far, if you simply require 12 characters minimun, 80% of his list is unnecessary.

      2 replies 4 retweets 7 likes
    8. Per Thorsheim‏Verified account @thorsheim 6 Aug 2017
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      Replying to @TychoTithonus @PwdRsch and

      And by setting minlength=12 and saying so on screen, UX but would be far better than being told «you can’t use that pwd Dave. Try again.»

      1 reply 0 retweets 4 likes
    9. Hector Martin‏ @marcan42 6 Aug 2017
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      Replying to @thorsheim @TychoTithonus and

      Except for all the people with 8-10 character passwords not in the blocklist which are perfectly adequate and would be rejected.

      1 reply 0 retweets 0 likes
    10. Per Thorsheim‏Verified account @thorsheim 6 Aug 2017
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      Replying to @marcan42 @TychoTithonus and

      ... which is why you would tell them the minimum pwd requirements up front, *before* they are asked to set a pwd. Which is good UX.

      1 reply 0 retweets 1 like
      Hector Martin‏ @marcan42 6 Aug 2017
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      Replying to @thorsheim @TychoTithonus and

      The *vast* majority of possible 8-character passwords are not pwned; requiring 12-char passwords is IMO worse UX.

      8:13 AM - 6 Aug 2017
      3 replies 0 retweets 0 likes
        1. New conversation
        1. Hector Martin‏ @marcan42 6 Aug 2017
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          Replying to @marcan42 @thorsheim and

          If requiring 12 character passwords made UX sense then why isn't every website doing that already?

          2 replies 0 retweets 0 likes
        2. Per Thorsheim‏Verified account @thorsheim 6 Aug 2017
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          Replying to @marcan42 @TychoTithonus and

          Legacy systems. Cost. Lack of knowledge. Laziness. Lack of business case or risk analysis to support the change. Standards. Even laws.

          1 reply 1 retweet 2 likes
        3. Show replies
        1. Per Thorsheim‏Verified account @thorsheim 6 Aug 2017
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          Replying to @marcan42 @TychoTithonus and

          Heh. I've got rainbow tables for LM that will crack almost anything <=14 characters. Your statement needs more context, like hash algo etc.

          0 replies 1 retweet 2 likes
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        1. Maximilian Golla‏ @m33x 6 Aug 2017
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          Replying to @marcan42 @thorsheim and

          And again, we don't need imho we need some evidence and science, oh wait here you go https://www.ece.cmu.edu/~lbauer/papers/2016/tissec2016-password-policies.pdf …

          2 replies 1 retweet 1 like
        2. Royce Williams‏ @TychoTithonus 6 Aug 2017
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          Replying to @m33x @marcan42 and

          Interesting. Imposing one random passphrase was still a UX challenge. Maybe present user with ten random phrases, and let them pick?

          1 reply 0 retweets 0 likes
        3. Show replies

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