📝Propagating Cipher Block Chaining (PCBC)

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§ 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.

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