But because of their encryption the FBI wasn't able to break into 1,200 of them.
Technology firms have taken strong encryption and given it to everyone, even drug dealers and pedophiles, he complained.
On the privacy side of things he has an Instagram account, he said, but it only has nine followers because he blocks everyone but family members.
Similarly with encryption, Comey said the FBI protects its own data with strong encryption and issues encrypted devices to its agents.
But if necessary, it can still get around the encryption on those devices and companies need to have a similar approach, he argued.
We suggest he ask the NSA, CIA, and OPM how well their secrets were protected.