AES Functional Description
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SWRU543–January 2019
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Advance Encryption Standard Accelerator (AES)
F9 Operation
Figure 17-8 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.
Figure 17-8. AES - F9 Operation
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