When the terrorists used Ol'Prof.Sami's memnonic in the return addresses on the anthrax letters, they let ALL the AlQaida cells know who'd done the deed.
BTW, it's only Sami and a couple of others who would have originated the "Greensboro" part of the key since they attended engineering school there! The NJ ZIP Code as shown in the anthrax letters, written backwards, is the ZIP Code of a town they would have passed through regularly going North up I-81 to intercept I-66 or I-70 to go East to New Jersey to visit friends and relatives in the rather large Moslem community located there! Maybe there's a halal store there, or a halal pizza joint. Someone might check it out.
The backwards ZIP Code is a matter of perspective. One direction it's Arabic; another direction it's English. (Note, notwithstanding the fact that Arabs write their numbers the same way we do). It's an attitude thing.
This set of key words, or the memnonic key, is pretty slick. Let's say you stop by your library to use the internet. If you sit down, you go to Google.com and do a search. Up come your three sites. You click on the one you want, and there you have it. (BTW, the Beachcomber site has been improved over the last few months.)
When you leave the library, the only thing showing in memory is that you did a wearch of www.google.com.
Your privacy is secure! The FBI is off your tail. You are home free.