Figure 226. Aes-Ctr Mode Encryption - STMicroelectronics STM32F405 Reference Manual

Cryptographic processor (CRYP)
Figure 226
1. K: key; C: cipher text; I: input Block; o: output block; Ps: plain text before swapping (when decoding) or
after swapping (when encoding); Cs: cipher text after swapping (when decoding) or before swapping (when
encoding); P: plain text; IV: Initialization vectors.
724/1731
and Figure 227 illustrate AES-CTR encryption and decryption, respectively.

Figure 226. AES-CTR mode encryption

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