A secure file en/decryption and Message Digest computation utility that is available on several platforms including Win95/NT4, OS/2 and DOS. Encrypted files are portable across these platforms. tbCrypt currently supports the DES, IDEA, Blowfish, NewDES and Lucifer block ciphers for file en/decryption and the MD5 and Secure Hash (SHA) algorithms for computing the Message Digest(signature) of a file. Additional features are secure file wipe, protected key entry, user configurable default settings and much more.