http://www.gamemastertips.com/cipher/cipher.htm

A very broad range of skills is also required to solve these puzzles, including technology, math, music, science, language, internet smarts, and more. Some levels may require you to use an internet search engine (such as Google), while others will simply require you to use common sense.

So what are you waiting for? If you have some decent patience and a sharp mind, give it a go!