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ISO/IEC 10116 Information technology — Security techniques — Modes of operation for an n-bit block cipher 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."

References※

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