Adafruit Arduino Cryptography Library using hardware-accelerated ARM CryptoCell CC310 on nRF52-based Bluefruit. CryptoCell CC310 is only available on nRF52840 therefore nRF52832 is not supported by this library.
Although this library license is MIT, it uses ARM precompiled static library, which has its own licence here. Please make sure you understand all the license term for files you use in your project.