I never gave it a thought why Microsoft decided to use some very peculiar names for:

Exchange Administrative Group (FYDIBOHF23SPDLT)
Exchange Routing Group (DWBGZMFD01QNBJR)

I was going through the updated documentation for Exchange 2007 SP1 @ TechNet and I came across the above mentioned names once again and maybe I had too much time at hand so I decided to look for the reason behind this and I am impressed what I discovered.

Please click on the Blog link mentioned below to read further.

The Secret Decoder Ring - The Hidden Truth in the Exchange 2007 Admin and Routing Group Names