I'm currently trying to decrypt the traffic in a IKEA Tradfri Network (some bulbs, a 5-button remote, a gateway). I use a CC2531 Sniffer with ZBOSS and Wireshark to sniff the traffic. This is working perfectly fine but I am having a hard time decrypting the packets.
I was expecting that I could sniff the process of adding a new bulb to the network where at some point the
network_key encrypted with the pre-shared
Trust Center link key (e.g. as mentioned here) will be exchanged between the remote and the bulb. I successfully tried this with a comparable Hue setup but struggle with Tradfri now.
I was able to capture the
Network Join Router Requestand
Network Join Router Response messages and was expecting the key transmission somewhere near that - but had no success.
Am I missing something? Is another pre-shared key used for Tradfri or their TouchLink implementation? Any feedback is highly appreciated.
Edit: I forgot to mention the keys I already tried: