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)

[Simon]

I have attached a file where I have modified the ble_app_uart example to use bonding (Enables a secure encrypted link with keys stored in flash). Check out this thread where I have provided more information. ble_app_uart_bonding_static_passkey.zip

Best regards,

Simon

[hkarthik97]

not abe to access this file

[Simon]

Try to download the file I provided in this thread.

Best regards,

Simon