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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 23 Feb 2017
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      Finally a SHA-1 collision. TL;DR: same-prefix collision, don't panic *yet*, but Git better start thinking of SHA-256 and don't trust PDFs.

      4 replies 55 retweets 44 likes
    2. Chaitanya Gupta‏ @chaitanya_gupta 23 Feb 2017
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      Replying to @marcan42

      shouldn't git move to sha-3 instead of sha-2?

      1 reply 0 retweets 0 likes
    3. Hector Martin‏ @marcan42 23 Feb 2017
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      Replying to @chaitanya_gupta

      Only if you believe SHA-3 is more secure than SHA-2. That is... not certain :-)

      2 replies 0 retweets 2 likes
    4. Tammi‏ @Zennoe_de 23 Feb 2017
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      Replying to @marcan42 @chaitanya_gupta

      is it save to assume that SHA-256 is good enough for now?

      1 reply 0 retweets 0 likes
    5. Hector Martin‏ @marcan42 23 Feb 2017
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      Replying to @Zennoe_de @chaitanya_gupta

      We don't have any good reason to believe SHA-256 is insecure.

      1 reply 0 retweets 0 likes
      Hector Martin‏ @marcan42 23 Feb 2017
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      Replying to @marcan42 @Zennoe_de @chaitanya_gupta

      SHA-2 vs SHA-3 boils down to "old and battle tested but sibling of broken SHA-1" and "new and unknown".

      7:49 AM - 23 Feb 2017
      2 replies 0 retweets 0 likes
        1. Hector Martin‏ @marcan42 23 Feb 2017
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          Replying to @marcan42 @Zennoe_de @chaitanya_gupta

          Think of SHA-3 as a backup if SHA-2 is broken... but nothing says SHA-3 won't be broken first.

          0 replies 0 retweets 1 like
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        1. The Keccak Team‏ @KeccakTeam 25 Feb 2017
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          Replying to @marcan42 @Zennoe_de @chaitanya_gupta

          Keccak/SHA-3 has actually been well-studied, see, e.g., http://eprint.iacr.org/2017/128  and refs therein

          1 reply 0 retweets 0 likes
        2. Hector Martin‏ @marcan42 25 Feb 2017
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          Replying to @KeccakTeam @Zennoe_de @chaitanya_gupta

          Of course, but SHA-2 has been studied for longer due to its age.

          1 reply 0 retweets 0 likes
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