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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. Bea Hughes‏ @beajammingh 12 Jul 2019
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      Encryption at rest on cloud services (AWS say), protects against what again? In case someone steals your disk out of the correct Amazon server? Do you do all your table top scenarios whilst watching the Mission Impossible films?

      64 replies 45 retweets 240 likes
      Show this thread
    2. Jon Topper‏ @jtopper 12 Jul 2019
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      Replying to @beajammingh

      Do you mean turning that feature on in, say, RDS or EBS, or doing it yourself in an ec2 instance?

      1 reply 0 retweets 1 like
    3. Bea Hughes‏ @beajammingh 12 Jul 2019
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      Replying to @jtopper

      just turning it on for an instance.

      1 reply 0 retweets 1 like
    4. Jon Topper‏ @jtopper 12 Jul 2019
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      Replying to @beajammingh

      So, the keys used to encrypt that volume are held in KMS. Amazon have separation of duties such that individuals with access to KMS infrastructure don’t have access to EC2 kit. In theory this protects against a bad actor at AWS removing hardware and having access to your data.

      1 reply 0 retweets 8 likes
    5. Jon Topper‏ @jtopper 12 Jul 2019
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      Replying to @jtopper @beajammingh

      I think @colmmacc had some tweets recently about how those keys are protected all the way to the hypervisor (and if not he may be able to elaborate anyway!)

      1 reply 0 retweets 3 likes
    6. Jon Topper‏ @jtopper 12 Jul 2019
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      Replying to @jtopper @beajammingh @colmmacc

      Pointing at the “look, encrypted” flag in the ui gives our healthcare clients the warm fuzzies anyway, which is of course really what matters.

      1 reply 3 retweets 29 likes
    7. Bea Hughes‏ @beajammingh 12 Jul 2019
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      Replying to @jtopper @colmmacc

      that.

      2 replies 0 retweets 6 likes
      Colm MacCárthaigh‏ @colmmacc 12 Jul 2019
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      Replying to @beajammingh @jtopper

      Encryption at rest protects against theft and seizure, but it also enables 1⃣: cryptographic shredding and 2⃣: separation of duties. Both are good opsec. 🔑gives you a second factor to control, can be used to ring fence systems. Compliance with regulations is a big reason too.

      2:52 PM - 12 Jul 2019
      • 6 Retweets
      • 51 Likes
      • Ryan Means Jason Umiker Abby Fuller Fernando Montenegro Simon L. B. Nielsen Amir Mikhak uadm Steffen Mazanek Moe ☁🖥☁
      2 replies 6 retweets 51 likes
        1. New conversation
        2. Jacob‏ @jhscott 13 Jul 2019
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          Replying to @colmmacc @beajammingh @jtopper

          from a unsound but pragmatic viewpoint, you are implicitly trusting your cloud vendor (they run the hardware! they could tap CPU/RAM/whatever). So EAR may protect against bad apples at AWS (unlikely) and/or some control/process failure (also unlikely). But, its straightforward

          2 replies 0 retweets 1 like
        3. Bea Hughes‏ @beajammingh 13 Jul 2019
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          Replying to @jhscott @colmmacc @jtopper

          they've done a great job of making it easy and should be commended, but it could be the same as glacier at launch, and just a placebo button to say it's happened.

          2 replies 0 retweets 0 likes
        4. 4 more replies
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        2. EJ Campbell‏ @ejc3 13 Jul 2019
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          Replying to @colmmacc @beajammingh @jtopper

          Doesn’t AWS do its own encryption at rest of underlying disk data regardless of whether an account has enabled it with its own keys?

          1 reply 0 retweets 0 likes
        3. EJ Campbell‏ @ejc3 13 Jul 2019
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          Replying to @ejc3 @colmmacc and

          Perhaps that’s only newer Nitro based systems.pic.twitter.com/hlpItbWyKX

          0 replies 0 retweets 0 likes
        4. End of conversation

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