I've been listening to matcom on and off for a few months now, and noticed odd patterns in encryption. While there are many units on the talkgroup that are encrypted, the dispatch itself appears to be encrypted on and off - sometimes in the clear, sometimes not, for a few weeks at a time. Is this the system itself, or just a matter of the switch being randomly flipped somewhere? Is there anyone else monitoring much digital traffic in AK? It would be nice to share experience and information.