SLAU723A October 2017 – October 2018 MSP432E401Y , MSP432E411Y
Figure 14-2 shows the basic ECB feedback mode of operation, where the input data is passed directly to the basic cryptographic core and the output of the cryptographic core is passed directly to the output buffer. For decryption the DES core operates in reverse, this means the decrypt key sequence is used for the data processing, where encryption uses the encrypt key sequence.