My two favorites aren't on the list, perhaps because they were never put in these exact words or they are mis-attributed:
"Cryptography is not magic pixie dust that you can sprinkle on a system to make it secure"
-Bruce Schneier [? - couldn't find a good source]
"If you think cryptography will solve your problem, either you don't understand cryptography, or you don't understand your problem."
-Roger Needham / Peter G. Neumann
I just dug around a bit to find the likely source of the "crypto magic pixie dust" quote, and I think it's Gary McGraw. He uses that phrase a lot, and a search of "crypto fairy dust" in Google Books brings up books by him dating as far back as 1999.
"Cryptography is not magic pixie dust that you can sprinkle on a system to make it secure" -Bruce Schneier [? - couldn't find a good source]
"If you think cryptography will solve your problem, either you don't understand cryptography, or you don't understand your problem." -Roger Needham / Peter G. Neumann