SPRUJ17H March 2022 – October 2024 AM2631 , AM2631-Q1 , AM2632 , AM2632-Q1 , AM2634 , AM2634-Q1
Figure 7-89 illustrates the Cipher Block Chaining (CBC) feedback mode of operation, where the input data is XOR-ed with the initialization vector (IV) before it is passed to the basic crypto core. The output of the crypto core passes directly to the output buffer and becomes the next IV. For decryption, the operation is reversed, resulting in an XOR at the output of the crypto core. The input cipher text of the current operation is the IV for the next operation.