In cryptography, a Block cipher mode of operation is an algorithm that uses a Block Cipher to provide an information service such as confidentiality or message Integrity. A Block Cipher by itself is only suitable for the secure cryptographic transformation (encryption or decryption) of one fixed-length group of bits called a block.

A Block cipher mode of operation describes how to repeatedly apply a Block Cipher's single-block operation to securely transform amounts of data larger than a block.

Common Block cipher mode of operation#

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