Tool to generate secured gazell pairing data for pre-paired secured gazell devices using only cables in production

[astella]

To the kind attention of Nordic support team,

we are using secured gazell library in our devices. We would like to pre-pair couple of devices (host-device) using valid secured gazell data for both,

without doing the actual pairing over the air. We would like to write pairing data in gazell flah memory areas using usb cables during production,

so to avoid any problem. Is there a simple way, maybe a tool, that is able to generate data valid to pair a couple of devices?

Should we build it on our own, after studying the key generation algorithm that is used for secured gazell library pairing?

Is there any tool that you could suggest? Any idea you have in mind to speed up this thing?

Thank you for your precious suggestions,

Best regards 

[ovrebekk]

Hi Stella

I don't know of any such tool unfortunately. 

Gazell and GZP haven't seen much development for the last couple of years, and the main use case for GZP is the dynamic pairing feature. 

I assume you are aware of the GZP user guide, which goes through the pairing procedure in detail?

By default the GZP parameters are stored at address 0x00001000. To help understand how the pairing data is stored and works you might want to run the dynamic pairing between two devices and see what is stored at this address on both sides.

Theoretically you should be able to copy this data, and write it into two new devices to do the pairing during production, but in order to generate the pairing data uniquely for different devices you need to replicate the algorithms implemented by GZP.  

Best regards
Torbjørn

[astella]

Thank you ovrebekk

[ovrebekk]

No problem Stella, only wish I had better news to share... ;)

I will close the case then.