In the goTenna Pro ATAK Plugin application, the encryption keys are 
stored along with a static IV on the device. This allows for complete 
decryption of keys stored on the device. This allows an attacker to 
decrypt all encrypted broadcast communications based on broadcast keys 
stored on the device.

The goTenna Pro ATAK plugin uses a weak password for sharing encryption 
keys via the key broadcast method. If the broadcasted encryption key is 
captured over RF, and password is cracked via brute force attack, it is 
possible to decrypt it and use it to decrypt all future and past 
messages sent via encrypted broadcast with that particular key. This 
only applies when the key is broadcasted over RF. This is an optional 
feature, so it is advised to use local QR encryption key sharing for 
additional security on this and previous versions.