SLAU723A October 2017 – October 2018 MSP432E401Y , MSP432E411Y
Figure 9-8 shows the F9 authentication mode of operation, where the input to the cryptographic core is XORed with the IV, and the output is XORed with the previous result to create the next result. The cryptographic core output is fed back as IV for the next block. The result is the output of the last XOR operation of the cryptographic core output.