I mean they got tuckers signal messages. It’s either compromised or his phone was. Likely they have everyones phones backdoored
Discussion
I would not trust my communications to be 100% secure unless it was software I wrote or audited using already established crypto libraries only on devices that are specifically isolated for this purpose
Research baseband processor backdoors.
https://youtu.be/D5cAfEGhH5o?feature=shared
Apparently graphene has this covered..