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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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    1. Colm MacCárthaigh‏ @colmmacc 25 Jun 2019
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      The traffic is encrypted using AES-256. Many protocols, such as TLS, do not have strong post-quantum security in their handshakes. This new layer means that those handshakes are protected on the wire by AES, which is safe against post-quantum risks.

      1 reply 4 retweets 26 likes
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    2. Colm MacCárthaigh‏ @colmmacc 25 Jun 2019
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      If you're worried about someone collecting data today, and decrypting it later when Quantum Computing is practical, this is nice defense in depth.

      1 reply 1 retweet 17 likes
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    3. Colm MacCárthaigh‏ @colmmacc 25 Jun 2019
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      To avoid Post-Quantum problems itself, VPC Encryption uses symmetric keys that are shared between senders. They are frequently rotated and revoked to provide forward secrecy.

      1 reply 1 retweet 12 likes
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    4. Colm MacCárthaigh‏ @colmmacc 25 Jun 2019
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      To avoid having any sensitive system that knows all of the keys; there are two independent, very different, key distribution mechanisms. Each distributes "pre-key material" which is then only combined in our Nitro security system to derive the real key.

      1 reply 1 retweet 15 likes
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    5. Colm MacCárthaigh‏ @colmmacc 25 Jun 2019
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      The effect of that is that if one of the distribution systems were some how compromised, this would not disclose the actual encryption keys. Very nice pattern to have!

      1 reply 1 retweet 18 likes
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    6. Colm MacCárthaigh‏ @colmmacc 25 Jun 2019
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      VPC Encryption compliments VPC Inter-Region Peering, which we've been similarly encrypting (with similar key derivation) from the day it launched. Underneath, and in addition to, all of this is the Lever Link Encryption Project.

      1 reply 2 retweets 13 likes
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    7. Colm MacCárthaigh‏ @colmmacc 25 Jun 2019
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      The Lever Link Encryption Project has been a truly massive endeavor to strongly encrypt, for now and all time, every network link that is in any way out of AWS physical control.

      1 reply 1 retweet 18 likes
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    8. Colm MacCárthaigh‏ @colmmacc 25 Jun 2019
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      Physical control means inside a facility we own and operate; and sometimes it means secure ducting over short distances with cool lasers that can detect any interference.

      1 reply 2 retweets 16 likes
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    9. Colm MacCárthaigh‏ @colmmacc 25 Jun 2019
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      If a link is outside our premises, or crossing an ocean, we encrypt it. For encryption, we use AES-256 again, with MACsec or Optical Layer encryption, with some more clever key agreement schemes that we had to invent! But don't worry, they are reassuringly boring.

      2 replies 3 retweets 16 likes
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    10. Luis Saiz Gimeno @home towards R0 less than 1‏ @lsaiz 27 Jun 2019
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      Replying to @colmmacc

      Some of us love boring cryptography. New key agreement protocols should be peer-reviewed, shouldn’t they? Moreover if I've understood well and it provides some form of PQ resistance (AES-256 can resist but you need to agree using some public key cryptography

      1 reply 0 retweets 0 likes
      Colm MacCárthaigh‏ @colmmacc 27 Jun 2019
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      Replying to @lsaiz

      It's nothing exciting, just using shared symmetric PSKs as an additional layer. Those mechanisms are peer reviewed, but new in this context. Might be a good topic for @RealWorldCrypto!

      4:39 AM - 27 Jun 2019
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      • Luis Saiz Gimeno @home towards R0 less than 1
      0 replies 0 retweets 1 like

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