Using the CEX*C,
you can use the triple-DES algorithm in addition to the classical
single-DES algorithm.
In the subsequent descriptions of the CBC method and ANSI X9.23 method, the actions of the
Encipher and Decipher verbs encompass both single-DES and
triple-DES algorithms. The triple-DES processes are depicted in Figure 1 where Left key and Right key refer to the
two halves of a double-length DES key. Figure 1. Triple-DES data encryption and decryption