Cipher Feedback (CFB) Mode: A mode of operation for block cipher systems that effectively converts a block cipher into a self-synchronizing stream cipher. In CFB mode, the previous ciphertext block is encrypted, and the output is XORed with the current plaintext block to get the current ciphertext block. As with CBC mode, the chaining mechanism causes the output to be highly sensitive to changes in the input, increasing security by masking patterns in the plaintext.
Categories: CC D5: Security Operations | CCSP D2: Cloud Data Security | CISM D3: Information Security Program | CISSP D3: Security Architecture and Engineering | Security+ D1: General Security Concepts | SSCP D5: Cryptography
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