[DanBC]

Frustratingly, there's more than one applied cryptography. There's (obviously) Schneier's book, and then there's this:

(http://www.cacr.math.uwaterloo.ca/hac/)

[tptacek]

Menezes is "Handbook Of Applied Cryptography", but this was actually a sore point with Schneier back in '98 (I feel like I listened to him complain about it in a bar at Usenix Security).

In any case, get Practical Cryptography.