How to encrypt and Decrypt BLE advertising data

RE: How to encrypt and Decrypt BLE advertising data

run_ar — Tue, 02 Apr 2019 14:44:01 GMT

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

RE: How to encrypt and Decrypt BLE advertising data

Naralasetty Praneeth — Tue, 02 Apr 2019 06:29:14 GMT

hey Alan Ajit

did you achieve the encryption and decryption of ble advertising data

i too have the same problem

RE: How to encrypt and Decrypt BLE advertising data

run_ar — Thu, 30 Aug 2018 19:00:50 GMT

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.

RE: How to encrypt and Decrypt BLE advertising data

Alan Ajit — Wed, 29 Aug 2018 07:16:15 GMT

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.

RE: How to encrypt and Decrypt BLE advertising data

run_ar — Wed, 29 Aug 2018 06:47:00 GMT

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