Re: Need info on Encyption book

You'll learn how to protect your communications with techiques for transposing characters in text, replacing characters, with new ones, using arrays, and more.

Haha... sounds more like "How to encrypt messages so that prying eyes can read them too." Character substitution? You'll need to do a lot better than that to beat cryptanalysis. A simple character substitution array wouldn't fool most people on this list if they took a serious crack at it.