Propagating Cipher-block Chaining (PCBC)
The propagating cipher-block chaining or plaintext cipher-block chaining mode was designed to cause small changes in the ciphertext to propagate indefinitely when decrypting, as well as when encrypting.
Encryption and decryption algorithms are as follows:
PCBC is used in Kerberos v4 and WASTE, most notably, but otherwise is not common. On a message encrypted in PCBC mode, if two adjacent ciphertext blocks are exchanged, this does not affect the decryption of subsequent blocks. For this reason, PCBC is not used in Kerberos v5.
Read more about this topic: Block Cipher Modes Of Operation
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