SLAU723A October 2017 – October 2018 MSP432E401Y , MSP432E411Y
Figure 9-7 shows the XTS mode of operation for encryption and decryption. The input to the cryptographic core is XORed with the IV; the output of the cryptographic core is XORed with the same IV. For decryption, the cryptographic core operates in reverse, but the XOR operations are the same.
NOTE
The IV is created with an initial encryption, followed by an LFSR operation for each new block.