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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.
– GillesMar 29 '13 at 21:07
@Gilles Thanks for pointing that out. Corrected the question.
– RazickMar 29 '13 at 21:12
