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Crypto.CFBMode

Ciphertext Feedback Mode is a mode designed to prevent trivial forms of replay and swap attacks on ciphers. It is given as: $\begin{aligned} C_i &= P_i \oplus C_{-1} \\ C_{-1} &= E_k(C_i) \end{aligned}$

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.

Types

Type	Description
TCFBCipherMode	CFB Cipher Mode