WindowSecurity.com - Ideal-to-Realized Security Assurance In Cryptographic Keys (Part 1)

Title: Ideal-to-Realized Security Assurance In Cryptographic Keys (Part 1)
Author: Justin Troutman
Summary: In the first installment of this two-part series, we'll cover key length, and relative concerns, such as entropy and how password etiquette affects key space complexity. We'll look at how the length of the key doesn't inherently equate to the security of the key, and why security isn't even just about keys, at all.
Link: http://www.WindowSecurity.com/articles/Ideal-to-Realized-Security-Assurance-Cryptographic-Keys-Part1.html