A fascinating talk on how the FBI ran an encrypted cellular phone network for organized crime and drug traffickers. The interesting bit I thought was they came close to surveilling the messaging in the United States, but the DOJ squashed it, which made me think cover for the drug traffickers working with the CIA within the United States, as they had appeared to find the legal authorization. This is really organized crime people not using good OPSEC. A simpler approach would be burners and voice comms with coded messaging, regularly rotated. Also a dedicated computer with Tails using Tor for messaging from WiFi hotspots, preferably with yagi antennas and distance from the hotspot. But convenience and complacency gets everyone eventually. It also reminds me that some Americans had helped cartels in Mexico setup encrypted radio systems for communications using distributed towers, but you too complicated a system you have points of compromise. The digital Panopticon erected around everyone is already pretty dangerous, so learning lessons for good OPSEC for anyone is well worth the effort.