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Is there any tool which allows me to encrypt /decrypt file names in ubuntu?

e.g. I create a directory, all the file names there are encrypt. When I mount it with a password, all the file names there will be decrypted.

Is there such a thing?

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up vote 2 down vote accepted

Look into Truecrypt. Does just what I believe you are looking for.

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ecryptfs would be apt for your use if you just need to encrypt a directory. Other options would be dm-crypt, Luks, truecrypt though they tend to work on whole filesystem (needs a block or loop device)

See for installation instruction

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