How does a 'block cipher' differ from a 'stream cipher' in terms of the encryption process?

  • Encrypts data one bit at a time (stream of bits)
  • Encrypts data using a non-linear transformation
  • Processes fixed-size blocks of data
  • Utilizes both fixed and variable-sized blocks
A block cipher processes fixed-size blocks of data, typically in chunks of 64 or 128 bits, while a stream cipher encrypts data one bit at a time. Understanding this difference is essential in cryptographic design and selection, as it influences factors such as efficiency, parallelization, and susceptibility to certain types of attacks. Knowing the characteristics of block and stream ciphers enhances expertise in encryption algorithms.__________________________________________________
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