In the ECB mode, each block of plaintext is separately enciphered and each block of the ciphertext is separately deciphered. In other words, the encipherment or decipherment of a block is totally independent of other blocks. ICSF uses the ECB encipherment mode for enciphering and deciphering data with clear keys using the encode and decode callable services.

ICSF does not support ECB encipherment mode on CDMF-only systems.