Secret Communication System (patent)

there is a thing called trunking and switching, and it has been in use for a long time.

g00gles patent describes this hueristic, and g00gle did not invent it. This is what made the free for all that was police radio scanning, turn into a hack required situation if you wanted to follow a conversation instead of getting, what is equivalent to reading from a paper shredders bin

https://en.wikipedia.org/wiki/Trunking