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What encryption algorithm is used by the partition encryption function of Disk Utility?

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    Ext4 does not have any encryption capability. If you have an encrypted ext4 filesystem, something else is doing the encryption, and if you don't tell us what it is, we can't tell.
    – Gilles 'SO- stop being evil'
    Mar 29, 2013 at 21:07
  • @Gilles Thanks for pointing that out. Corrected the question.
    – Razick
    Mar 29, 2013 at 21:12

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gnome-disk-utility uses crypttab, which in turn uses luks (linux unified key setup) and dm-crypt to provide encryption.

Luks uses TKS1 and the PBKDF2 hash algorithm.

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