<a href="http://www.schneier.com/crypto-gram-9909.html#NSAKeyinMicrosoftCryptoAPI" rel="nofollow">http://www.schneier.com/crypto-gram-9909.html#NSAKeyinMicros...</a><p><a href="http://www.wired.com/science/discoveries/news/1999/09/21577" rel="nofollow">http://www.wired.com/science/discoveries/news/1999/09/21577</a> includes the explanation from Microsoft.<p>Also I swear to God this has to be like the third repost of NSAKEY in a week.
The "NSA" in "NSAKEY" could stand for just about anything. Or it could just be some programmer's joke. It's definitely not convincing evidence that this construct has anything to do with the NSA.