What mechanism randomizes the BLE address that gets hashed with the IRK?

RE: What mechanism randomizes the BLE address that gets hashed with the IRK?

Hung Bui — Wed, 19 Nov 2014 14:10:24 GMT

Hi Matt, It's is supported on S110 v7.0 production. You can have a look at the release note to find more information. Please note that to add the custom IRK in you would need to use the sd_ble_opt_set API.

RE: What mechanism randomizes the BLE address that gets hashed with the IRK?

Matt-M — Fri, 07 Nov 2014 06:31:37 GMT

Dear Hung Bui,

We are also interested in this function for our projects using nRF51822. Do you have any update for S110 version?

"This may change in S110 v7.x, but I can't say for sure when it will be available."

Best Regards, Matt

RE: What mechanism randomizes the BLE address that gets hashed with the IRK?

Hung Bui — Fri, 11 Apr 2014 16:55:59 GMT

Hi Anders,

The S110 currently use BLE_GAP_ADDR_TYPE_RANDOM_STATIC address type.

EDITED: the following information provided earlier was not correct.

[u] As you know you can set BLE_GAP_ADDR_TYPE_RANDOM_PRIVATE_RESOLVABLE type in sd_ble_gap_address_set()

The current S110 stack provides no API to generate address from IRK, and you would need to do that by your application. You can have a look at section 10.8.2.2 at Part C, Vol 3 in the Bluetooth Core Spec v4.0 to know how to generate the random resolvable address from IRK.[/u]

Corrected information:

Current S110 softdevice (v6.x and v7.0.0 alpha) doesn't have a way to distribute the IRK when bonding. Therefore BLE_GAP_ADDR_TYPE_RANDOM_PRIVATE_RESOLVABLE is not usable with the current S110 softdevice.

This may change in S110 v7.x, but I can't say for sure when it will be available.

I am sorry for the confusion.