It's fairly difficult to do anything useful with ultra-secret magic decryption tools. You can passively observe, but taking any action, even subtle indirect act

It's fairly difficult to do anything useful with ultra-secret magic decryption tools. You can passively observe, but taking any action, even subtle indirect action, means you're eventually going to alert a target to your capabilities. Anyway, these are extraordinarily difficult problems which may not have good solutions outside of quantum computing. You can throw all the smart people and computing power in the world at a problem and still come up with almost nothing.