A block cipher developed by Ron Rivest.
RC2 is a block cipher with variable key length that can
be used as a replacement for Data Encryption Standard
(DES) for encryption and decryption of information. It
/> is used particularly in software exported internationally
since RC2 is not subject to the same restrictions as DES
is for export control. RC2 employs a block size of 64
bits and adds a random “salt” to encryption keys to
reduce the possibility of certain types of cryptanalytic
attack. RC2 is several times faster than DES on comparable hardware and can be made more secure than DES by choosing a suitably long key.