📝Propagating Cipher Block Chaining (PCBC)

tags

§ Cryptography

• 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.

Backlinks

• 📝 Cipher Block Chaining (CBC)
• 📝 Block cipher mode of operation