In General

Ok, so I suck at encryption in general and I would like to change that. If someone could post some ideas, tips, techniques, methodologies, links, articles, etc. to help me learn I'd really appreciate it. Thanks.

Try using Cain for decryption when you know the encryption.

that won't help him understand it though…try this site http://www.antilles.k12.vi.us/math/cryptotut/home.htm

I think I should have been more specific. I know a decent amount about encryption in general. But for the life of me I can't break any of the encryption challenges on this site. I am looking for help specific to these challenges (besides the first one).

I am also interested about derypting idea used in challenges (next to one). Any advice where to start?

http://www.fortunecity.com/skyscraper/coding/379/lesson1.htm

It long ! so read it when u have a lot of spare time