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OFB

OFB is called output feedback mode, and its feedback content is packet-encrypted content instead of ciphertext.

Encryption

decryption

Advantages and disadvantages

Advantages

  1. Does not have error propagation characteristics.

Disadvantages

  1. IV does not require confidentiality, but a different IV must be chosen for each message.
  2. Does not have self-synchronization capability.

Applicable scene

Applicable to some scenarios where the plaintext redundancy is relatively large, such as image encryption and voice encryption.


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