Use the plaintext data encrypting key to encipher or decipher the data using the Data Encryption Standard. REPRO lets you supply an 8-byte value as the plaintext data encrypting key. If you do not supply the data encrypting key, REPRO provides an 8-byte value to be used as the plaintext data encrypting key. Using the REPRO DECIPHER option, you can either decipher the data on the system that it was enciphered on or decipher the data on another system that has this functional capability and the required key to decipher the data. Given the same key, encipher and decipher are inverse operations.

If you supply your own plaintext data encrypting key on ENCIPHER or DECIPHER through the REPRO command, you risk exposing that key when the command is listed on SYSPRINT. To avoid this exposure, direct REPRO to a data encrypting key data set to obtain the plaintext data encrypting key.