Decryption algorithm

[hkarthik97]

I want to send  an encrypted message from phone to nrf52 via ble uart and decrypt it in nRF52 and process it. Suggest me an example

[Dmitry]

Hi,

if symmetric encryption is enough for you, the most simple *right* way I could suggest is AES-CTR encryption. Take a look at examples\crypto\nrf_crypto\aes\aes_ctr in SDK. At Android side, it corresponds to AES/CTR/NoPadding scheme, here is an example to start with: https://gist.github.com/beonit/4635613 (note that you should make IvParameterSpec from your iv[], not from key as in this example)