How to encrypt and Decrypt BLE advertising data

[Alan Ajit]

Dear Nordic,

Is it possible to encrypt BLE advertising data? how encrypt this advertising data packet and also decrypt the packet.

i want to encrypt my BLE advertising packet where i start ? can you help me to achieve this?

I have one more question is it any unique id for nrf52840 chip?

[run_ar]

Hi,

The nRF52840 has at least a device address that is pseudo randomly generated (2 bits are not random). See FICR for more details.

If you want to encrypt advertisement data you need to do that in your application. Something like this might do the trick: https://devzone.nordicsemi.com/f/nordic-q-a/13429/aes-encryption-with-sd

[Alan Ajit]

Thanks for your replay.

Is this device address is unique or not?

when I read FICR, Its showing Device id(8 byte) and device address(6 byte). Is this are unique for all chips of NRF?

One more doubt in encryption/decryption you said AES support for encryption not decryption. Then how to decrypt receiver end? I am new in this field. i want to encrypt advertising data from transmitter and decrypt the data in receiver end.

[run_ar]

The address is not guaranteed to be unique. But it is 46 random bits, so it is very unlikely there will be a match. If you use AES, you will need a preshared key, I think the example in the link I sent you has code for both decrypt and encrypt.

[Naralasetty Praneeth]

hey Alan Ajit

did you achieve the encryption and decryption of ble advertising data

i too have the same problem

[run_ar]

This does not seem related, peer manager issue? Please consider creating a separate thread with your question.