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RichFelker's profile
Rich Felker
Rich Felker
Rich Felker
@RichFelker

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Rich Felker

@RichFelker

Yeah, I do @musllibc, FOSS & infosec stuff. But now is not the time for a mostly-/only-tech Twitter feed.

musl-libc.org
Joined March 2014

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    1. hanno‏ @hanno Feb 18

      Things that won't solve IoT security: More efficient crypto chips.https://news.mit.edu/2018/energy-efficient-encryption-internet-of-things-0213 …

      3 replies 3 retweets 18 likes
    2. Rich Felker‏ @RichFelker Feb 18
      Replying to @hanno

      It might solve the problem of ignorant founders and managers thinking they can't do TLS because it's too costly..?

      1 reply 0 retweets 1 like
    3. Justin Cormack‏ @justincormack Feb 18
      Replying to @RichFelker @hanno

      It only seems to do mTLS, bizarrely

      1 reply 0 retweets 1 like
    4. Rich Felker‏ @RichFelker Feb 18
      Replying to @justincormack @hanno

      Doing protocol rather than primitives is a horrible mistake unless it has upgradeable firmware....

      1 reply 0 retweets 0 likes
    5. Justin Cormack‏ @justincormack Feb 18
      Replying to @RichFelker @hanno

      yeah that seemed weird. I like the idea of EC instructions though generally. Seems a sane add on to eg vector instruction sets that already have wide ints.

      1 reply 0 retweets 0 likes
    6. Brian Mastenbrook‏ @bmastenbrook Feb 18
      Replying to @justincormack @RichFelker @hanno

      Field arithmetic instructions would be generally more useful, but some manufacturers (eg Microchip) are already putting in full offload. The problem I have with those implementations is that they're not reviewable.

      1 reply 0 retweets 1 like
    7. Brian Mastenbrook‏ @bmastenbrook Feb 18
      Replying to @bmastenbrook @justincormack and

      EC cost isn't what's keeping TLS expensive for IoT though. Making max fragment length mandatory and eliminating handshake fragmentation would help a lot. Adding some new AES + CMAC and non-broken AES + HMAC modes would also help hardware that has AES or SHA units.

      2 replies 1 retweet 3 likes
    8. Brian Mastenbrook‏ @bmastenbrook Feb 18
      Replying to @bmastenbrook @justincormack and

      Unfortunately the 1.3 spec authors care more about making it slightly faster to get to YouTube than they do implementation simplicity (and correctness) or scalability to small systems. :/

      1 reply 1 retweet 3 likes
      Rich Felker‏ @RichFelker Feb 18
      Replying to @bmastenbrook @justincormack @hanno

      Can't you just drop all those features (session resume stuff etc) when implementing?

      6:40 AM - 18 Feb 2018
      1 reply 0 retweets 0 likes
        1. Brian Mastenbrook‏ @bmastenbrook Feb 18
          Replying to @RichFelker @justincormack @hanno

          You can. I think adding features was a poor choice of direction for TLS 1.3 though. I think would have been more important to make it as simple as possible to produce a correct implementation by limiting protocol flexibility.

          0 replies 0 retweets 2 likes
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