The way I understand it, the fire commissioner ordered all fireground comms to be encrypted for privacy when the system was being built. It can't be due to HIPA, because if it was, they wouldn't be broadcasting patient reports over the unencrypted fire channels like they do every day. Some I have spoken to say it's so nobody can hear the guys curse when they're excited, others have said it's to try and keep sensitive conversations (like those about fire victims, etc) from being heard. The problem with that, though, is the IC must still come over the clear channel and tell the dispatcher what they have, so it defeats the purpose, I think. As for the PD side, they don't encrypt the district channels, but there are a slew of unpublished channels for narcotics, etc, that use encryption. The problem with those channels, though, is the encryption can be turned off, and about half the cops turn it off, so you can still hear what they say (cursing and all, lol) half the time, if you happen to know the talkgroups. (No, I won't divulge that info)