Is there any easy way to determine if the equipment can be trusted?
Does anyone offer services in this area and how much would it cost him?
Does anyone offer services in this area and how much would it cost him?
If I were him I would sell them and buy new ones.
But another thought that crosses my mind is that future disclosures and research may give him new insight to inspect the equipment and try to understand the extent of potential compromise. I would replace it but then hold onto it forever. Twenty years from now, the parts could be a goldmine for documenting what will surely be a historically significant time in the world of surveillance and privacy.
a LOT MORE
He would not sell these devices. He would be someone who feeds false information into them to screw with people that are on the other end, and laugh manically while doing so.
In all honesty, I think a security researcher would be more curious figuring out what they did.
The allied forces did this during the second world war. They could not admit that German encryption had been cracked, so if their only source of knowledge about an event was through breaking of encryption, they would not act on it - even if by doing so, large numbers of civilians would die, because in the long run - far more would be saved by bringing the war to a quicker end.