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colmmacc's profile
Colm MacCárthaigh
Colm MacCárthaigh
Colm MacCárthaigh
@colmmacc

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Colm MacCárthaigh

@colmmacc

AWS, Apache, Crypto, Irish Music, Haiku, Photography

Seattle
notesfromthesound.com
Joined April 2008

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    Two-way (sending and receiving) short codes:

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    1. Matthew Green‏ @matthew_d_green 19 Jun 2019
      • Report Tweet
      • Report NetzDG Violation

      Senator Wyden asks NIST to develop standards for safely sending and receiving files. This would be a modern and secure replacement for the “encrypted” ZIP files most government employees currently email each other. https://www.wyden.senate.gov/imo/media/doc/061919%20Wyden%20Sensitive%20Data%20Transmission%20Best%20Practices%20Letter%20to%20NIST.pdf …

      20 replies 101 retweets 219 likes
      Show this thread
    2. Matthew Green‏ @matthew_d_green 19 Jun 2019
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      This is actually really important. Right now on many ancient versions of Windows, when you “encrypt” (password protect) a ZIP file using the OS default utility, you get encryption using the legacy ZIP scheme, which is totally broken. 1/

      7 replies 17 retweets 46 likes
      Show this thread
    3. Matthew Green‏ @matthew_d_green 19 Jun 2019
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      Not broken as in “you picked password kittycat1”, which would be bad enough. Broken as in, there’s a known plaintext attack on the terrible cipher of legacy ZIP that can recover the key. https://link.springer.com/chapter/10.1007/3-540-60590-8_12 … 2/

      4 replies 9 retweets 58 likes
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    4. Matthew Green‏ @matthew_d_green 19 Jun 2019
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      This is the default ZIP encryption algorithm on Windows XP and (ugh) current versions of MacOS. To Microsoft’s credit, they removed it on more recent versions of the home version of Windows. Not sure what the Pro versions use. 3/

      8 replies 7 retweets 37 likes
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    5. Matthew Green‏ @matthew_d_green 19 Jun 2019
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      But even if you use a modern ZIP utility, you’re still dealing with modestly crummy crypto. Check out the iteration count on that PBKDF2. 🤦🏻‍♂️ 4/pic.twitter.com/GZovF1wqNb

      2 replies 2 retweets 31 likes
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    6. Matthew Green‏ @matthew_d_green 19 Jun 2019
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      We cryptographers are arguing over PGP key sizes. Meanwhile government employees are emailing each other documents encrypted with a cipher that was handily broken in the 90s. 5/

      5 replies 38 retweets 89 likes
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    7. Matthew Green‏ @matthew_d_green 19 Jun 2019
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      This is one of those areas (like legacy SMS) where we’ve somehow gotten stuck with the least common denominator. There’s a huge opportunity for smart people in this field to come up with something much better. 6/

      1 reply 2 retweets 27 likes
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    8. Matthew Green‏ @matthew_d_green 19 Jun 2019
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      • Report NetzDG Violation

      Matthew Green Retweeted Adam Langley

      To quote @agl__ (the guy who has managed to ship post-quantum cryptography in your web browser), there’s a huge opportunity here if NIST responds and asks the community for proposals. 6/6https://twitter.com/agl__/status/1141433190487220224?s=21 …

      Matthew Green added,

      Adam Langley @agl__
      Replying to @matthew_d_green
      I hope they ask for proposals. There are a number of valuable ideas in this space (Firefox Send, minilock, probably Filippo has something).
      1 reply 3 retweets 35 likes
      Show this thread
    9. Matthew Green‏ @matthew_d_green 19 Jun 2019
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      (Also dammit, I cannot properly number a Twitter thread to save my life.)

      7 replies 1 retweet 30 likes
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      Colm MacCárthaigh‏ @colmmacc 19 Jun 2019
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      Replying to @matthew_d_green

      FWIW, if NIST did have a competition, I think AWS would make a submission, either or ourselves or in partnership with others as we have before. We already have an "Encrypt this" in our Crypto SDK, and thoughts on more.

      1:12 PM - 19 Jun 2019
      • 1 Retweet
      • 9 Likes
      • Nimrod Aviram SafetyDesertMulligan 🇪🇺 Alex Weibel Kevin Dienst 🐍 Dan Rabinowitz Deirdre Connolly¹ 1. d4 * Eric Ericson Matthew Green
      0 replies 1 retweet 9 likes

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