Encryption Workshop sharewareScreenshot
Encryption Workshop includes file and folder encryption and decryption tool. Currently nine strong symmetrical block ciphers are implemented: BLOWFISH, GOST, RC 4, DES, Skipjack, TWOFISH, TEA and XOR. Any type of file can be encrypted/decrypted, not only ZIP files. If working with ZIP archives you might want to consider using encryption rather than password protection - it is much safer.
