ISO/IEC 10116

ISO/IEC 10116 Information technology — Security techniques — Modes of operation for an n-bit block cipher[1] is an international standard that specifies modes of operation for block ciphers of any length.

The modes defined are:

  • Electronic codebook (ECB)
  • Cipher block chaining (CBC)
  • Cipher feedback (CFB)
  • Output feedback (OFB)
  • Counter (CTR)

The standard notes that some modes require padding, but states that "Padding techniques ... are not within the scope of this International Standard."[2]

References
  1. ISO/IEC 10116:2006 Information technology — Security techniques — Modes of operation for an n-bit block cipher
  2. ISO-IEC 10116:2006, clause 5, Requirements
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