topic [Security] CSEC components's Encryption and decryption performance in S32K

[Security] CSEC components's Encryption and decryption performance

Gideon — Wed, 06 Dec 2023 06:09:59 GMT

Dear NXPs:

From UseNote:AN5401 We know :

1.Setup: M4 Core running at 80 MHz and Flash running at 26.67 MHz.

2.measured to process 112bytes of data

According to the above two conditions, the encryption and decryption performance of AES-128-CBC is as follows:

ENC_CBC: Execution Time = 0.028718;

DEC_CBC: Execution Time = 0.029153;

Q：We design S32K146's M4 Core running at 64 MHz and Flash running at 16 MHz.measured to process 112bytes of data, what is the performance of ENC_CBC and DEC_CBC？

Re: [Security] CSEC components's Encryption and decryption performance

lukaszadrapa — Thu, 07 Dec 2023 06:22:32 GMT

Hi @Gideon

I'm afraid that we do not have numbers for all possible use-cases. If some specific performance numbers are required, our recommendation is to measure it directly in your system. Easiest option is to toggle a GPIO before and after calling of a function and measure the time by an oscilloscope.

Regards,

Lukas

Re: [Security] CSEC components's Encryption and decryption performance

Gideon — Fri, 08 Dec 2023 08:08:50 GMT

Dear NXPs：

Is there any theoretical estimation formula or empirical formula on NXP?

Re: [Security] CSEC components's Encryption and decryption performance

lukaszadrapa — Mon, 11 Dec 2023 06:31:54 GMT

Sorry, there's no such formula.

Regards,

Lukas