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A comment on PSA: Upgrade your LUKS key derivation function. Parent comment

Re:PSA: Upgrade your LUKS key derivation function by mjg59 on Tuesday April 18, 2023 @10:43PM (#35623653)
If you can dump the contents of memory then you have the key (after all, the CPU has to be able to encrypt and decrypt the material, so it has to be available).
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Re:PSA: Upgrade your LUKS key derivation function by zamnos on Tuesday April 18, 2023 @10:52PM (#35623718)
Pedantically, if there's an HSM/similar hardware in play, the CPU only asks for material to be encrypted/decrypted and doesn't have the key in system RAM to be able to do so itself.

MacOS machines with a T2 chip keep the encryption key in the T2 chip so it isn't in system RAM.

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Re:PSA: Upgrade your LUKS key derivation function by ryan-c on Wednesday April 19, 2023 @03:11AM (#35625232)
Apparently it's possible to keep the key in the debug registers: https://en.wikipedia.org/wiki/TRESOR
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