Block size (cryptography)

In cryptography, **block size** refers to the size of the data blocks that a block cipher operates on during the encryption and decryption processes. A block cipher is a type of symmetric key cipher that encrypts data in fixed-size blocks, as opposed to stream ciphers, which encrypt data one bit or byte at a time. ### Key Points about Block Size: 1. **Fixed Length**: Block ciphers operate on data in blocks of a specific size.