[nRF5 SDK15.3]52810 encryption problem

[zero]

Dear friend,

How much RAM does ECB encryption consume?
Currently implemented using a third-party AES library (consumes 2.3k of RAM).
Is there a way to encrypt that consumes less RAM?

[zero]

Hi Charlie，

Sorry, I made a mistake, I am currently using sdk14.2, I did not see a similar description of "Memory management in nrf_crypto" in sdk14.2. Based on sdk14.2, how much ram does it take to encrypt with micro-ecc backend?

Best regards,

Zero

[Charlie]

Hi Zero,

1)nRF5 SDK1.4.x does not have a formal production-level nrf_crypto library. 

2)micro-ecc is for ECDH or ECDSA implementation, they are key exchange algorithms. It is not used for AES, which is a kind of bulk encryption algorithm.

If you just start your research on crypto usage, I suggest you learn some basic knowledge on security cipher suit first, then start with the latest Cryptography samples — nRF Connect SDK 1.9.0 documentation (nordicsemi.com). This will speed up your development and also make your life much easier. ;-)

Best regards,

Charlie

[zero]

Hi Charlie，

Looking at the specification of 52810, it supports ECB peripherals, so how to use ECB peripherals for encryption and decryption based on sdk14.2?

Best regards,

Zero

[Charlie]

Hi Zero,

The following library demostrates how ECB peripheral is used.

AES ECB encryption

modules\nrfx\hal\nrf_ecb.c

modules\nrfx\hal\nrf_ecb.h

Search function name through nRF5 SDK and you will find how these functions are used by other components.

Best regards,

Charlie