SPRUJB6B November 2024 – May 2025 AM2612
Figure 7-107 CBC-MAC Authentication ModeFigure 7-107 illustrates the CBC-MAC authentication mode of operations where the input to the crypto core is XOR-ed with the IV. The crypto core output is then fed back as IV for the next block. The last data input block is XOR-ed with an additional input value stored in the Temporary Buffer; this can be any pre-calculated value and is dependent on the alignment of the last input block. The result is the crypto core output of the last encryption operation.