Which implementations are allowed for the AES algorithm according to FIPS 197?

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Multiple Choice

Which implementations are allowed for the AES algorithm according to FIPS 197?

Explanation:
AES is defined by FIPS 197 with specific operations and key sizes, but it does not bind the standard to a single implementation medium. This flexibility lets AES be realized wherever it fits: as software routines on general-purpose CPUs, as firmware embedded in devices, or as dedicated hardware engines in cryptographic modules. The critical requirement is that the implementation correctly performs the AES algorithm and its specified modes of operation. Therefore, software, firmware, and hardware implementations are all permitted, so all of the above options are valid.

AES is defined by FIPS 197 with specific operations and key sizes, but it does not bind the standard to a single implementation medium. This flexibility lets AES be realized wherever it fits: as software routines on general-purpose CPUs, as firmware embedded in devices, or as dedicated hardware engines in cryptographic modules. The critical requirement is that the implementation correctly performs the AES algorithm and its specified modes of operation. Therefore, software, firmware, and hardware implementations are all permitted, so all of the above options are valid.

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