[ViVr]

> "The network, owned by a Dutchman named Danny Manupassa, had made a spectacular bungle: it had stored the private keys for the system on the same server as the network’s messages. Analysts in the Netherlands obtained the private keys and then used them to decrypt Ennetcom texts."

Not your keys not your comms. But even then then, apply defense in depth.

> "Sky’s messages ran on a different system than EncroChat’s, and it was more difficult to infect the network with bulk malware. Instead, someone with knowledge of the investigation told me, analysts seem to have launched a “protocol attack” that deceived handsets into revealing their private keys."