Encrypting a single file with password and keyfile

Question

I am a fan of TrueCrypt and I guess it's the best encryption tool available. As far as I understand, TrueCrypt created encrypted containers which acts a place to store files.

I would like to encrypt a single file. Preferably with a password and a special key file (like in TrueCrypt).

It would be great (but not mandatory) if the file doesn't require any third party software to encrypt and decrypt, in the sense that I provide the password and key to the file directly.

Answer 1

You can always use the openssl command line utility, works on all OSs.

check http://tombuntu.com/index.php/2007/12/12/simple-file-encryption-with-openssl/ and http://www.dslreports.com/shownews/Encrypt-files-quickly-with-OpenSSL-87586 for examples.