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If you change the key, you will need to re-pair all devices (as indicated in the FAQ) |
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Ok, I got it. The network key is for broadcasting and it's the same for all, while the master key cannot be changed because it's embedded into each zigbee device. |
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This article https://www.zigbee2mqtt.io/advanced/zigbee/03_secure_network.html describes how to change the Zigbee Transport Key. As far as I understand, this is the key used by the zigbee end devices to encrypt their secret key and send to the zigbee hub. So this key needs to be known in advance by the zigbee end devices, doesn't it? If I change this key, how would the ZEDs know with which key to encrypt their keys?
Also: does the ZEDs generate a new key on each new pair? Or do they have a fixed key?
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