AppSkey modification in ABP Communication

ChirpStack Network Server
#1

Hi,

I have created a device with ABP parameters and sending predefined data from LoRa node.
I am getting the data(encoded data) in MQTT subscription.

As a negative test, I modified the AppSKey at LoRa Server and tested. In that case also I am getting some unexpected data(not the expected values ).

Is that expected behavior that LoRa server will publish the data even if we are changing the AppsKey.

Note:If I am modifying the AppSKey and NwSkey,not getting the unexpected data.

#2

Yes, this is expected. LoRa Server does the MIC validation based on the NwkSKey. LoRa App Server (the only component knowing the AppSKey) does not validate anything, it just decrypts the given data using the given AppSKey.

#3

Thank you…
Please consider this thread as closed