Ciphertext Feedback Mode is a mode designed to prevent trivial forms of replay and swap attacks on ciphers. It is given as:
The output feedback width is equal to the size of the block cipher. That is this mode is used to encrypt whole blocks at a time. However, the library will buﬀer data allowing the user to encrypt or decrypt partial blocks without a delay. When this mode is first setup it will initially encrypt the initialization vector as required.
|TCFBCipherMode||CFB Cipher Mode|