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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. Matthew Garrett‏ @mjg59 22 Apr 2019
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      Ok so how about https://github.com/mjg59/linux/commit/cd2bb1eb23ededafc2f301f8bc5561523daa96e6 …

      10 replies 6 retweets 30 likes
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    2. Matthew S. Wilson‏ @_msw_ 22 Apr 2019
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      Replying to @mjg59

      Cc @colmmacc

      1 reply 0 retweets 0 likes
      Colm MacCárthaigh‏ @colmmacc 22 Apr 2019
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      Replying to @_msw_ @mjg59

      We'd set this for our secret stores ... though there's no real risk of booting into another OS in our own case.

      4:34 PM - 22 Apr 2019
      2 replies 0 retweets 0 likes
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        2. Colm MacCárthaigh‏ @colmmacc 22 Apr 2019
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          Replying to @colmmacc @_msw_ @mjg59

          For this case; would it be better to support encrypted pages, where the kernel holds the key, and uses any kinds of TPM or trust-store that might be available? I'm thinking of those crazy heist-with-liquid-nitrogen physical theft RAM recovery attacks.

          1 reply 0 retweets 4 likes
        3. Matthew Garrett‏ @mjg59 22 Apr 2019
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          Replying to @colmmacc @_msw_

          Some secrets basically have to stay in RAM for performance reasons (eg, there's no way you can punt disk decryption off to the TPM), and it seems difficult to have any kind of protection in that without hardware encryption of the pages

          2 replies 0 retweets 2 likes
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        1. Matthew S. Wilson‏ @_msw_ 22 Apr 2019
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          Replying to @colmmacc @mjg59

          Sure, but lots of folks use kexec/kdump as a crash handler...

          0 replies 0 retweets 0 likes
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