dsd-fme -i tcp -fs -Z -N 2> log.ans
You may be right. However, it's an ambiguous, at best, law that can't possibly be enforced. Passive listening is undetectable, and unless you announce your dirty deeds, no one will know. I'm not a lawyer, but it seems like discussing how to recover encryption keys might be considered "conspiracy" and I have no desire to test that theory or set precedence. Besides, I think legalities are really only secondary to the concerns of freely available software to recover encryption keys may cause a desire to use more effective encryption, like AES. I'm glad I'm too dumb to know how.Discussing how to get it isn't illegal.
Listening to encrypted voices is what's illegal
Hmm…Unauthorized decryption is illegal across the entire planet.
In Sweden all monitoring and also attempts to decode encrypted signals is legal as long as it isn't a pay-per-view kind of service. You are allowed to own and use radios at any frequency as long as you do not use the transmit button, with a couple of exceptions. You are not allowed to disclose what you have heard on frequencies not intended for the public. I.E. no audio streaming allowed.