Privacy, Security, and OSINT Show

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PSA: Upgrade your LUKS PBKDF to Argon2id !! (tails.boum.org)

submitted 1 year ago by [email protected] to c/[email protected]

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TIL the French government may have broken encryption on a LUKS-encrypted laptop with a "greater than 20 character" password in April 2023.

https://nantes.indymedia.org/posts/87395/une-lettre-divan-enferme-a-la-prison-de-villepinte-perquisitions-et-disques-durs-dechiffres/

When upgrading TAILS today, I saw their announcement changing LUKS from PBKDF2 to Argon2id.

https://tails.boum.org/security/argon2id/index.en.html

The release announcement above has some interesting back-of-the-envelope calculations for the wall-time required to crack a master key from a LUKS keyslot with PBKDF2 vs Argon2id.

And they also link to Matthew Garrett's article, which describes how to manually upgrade your (non-TAILS) LUKS header to Argon2id.

https://mjg59.dreamwidth.org/66429.html

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[–] [email protected] 3 points 1 year ago (1 children)

https://unix.stackexchange.com/questions/260533/how-to-determine-what-encryption-is-being-used-a-luks-partition

Use these methods to see which version of LUKS your volume is using. Make sure you are using version 2 or higher.

[–] [email protected] 2 points 1 year ago* (last edited 1 year ago)

afaik LUKS1 is fine. And AES is fine.

What matters is which KDF is used in your luks slots (which hold your AES master encryption key)