📝Propagating Cipher Block Chaining (PCBC)

PCBC is a block cipher mode of operation, which is a variation of CBC.

The algorithm is the same as of CBC, but IV for the following blocks is ciphertext xored with original plaintext of previous block.

• This means that decryption can not be parallelized.

If two adjacent ciphertext blocks are exchanged, that does not affect the decryption of subsequent blocks.

This mode is uncommon.