Hello, I am a bit confused with the ARM Cryptocell 310 engine. As I can see this software is proprietary but in nrf5 sdk there is the cryptocell engine as external library (i.e .a). I am using zephyr withe nrf 52840-dk and I am interested to integrate the cryptocell engine to zephyr, can I do that using nordic's .a files. Should I buy some license from Nordic or ARM for the engine? I have already checked to ARM but I can not find any files to download in order to integrate this library to my project.
Thank you