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The title pretty much sums it up, but I want to create a second data partition on a web-facing server which is encrypted and requires two people to provide passphrases before it can be unlocked. Is this even possible?

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possible duplicate of… – neutrinus Apr 8 '14 at 10:08

I don't think that LUKS is ready for it.

But you can make a password that is just two passwords concatenated. Or have encrypted partitionfile on encrypted partition..

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Sorry, I should have been more clear - it needs to be 2 out of a possible 4 passphrases (any combination of 2 of the 4 need to work). – alanbeard Apr 8 '14 at 10:20

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