Cryptography: Code Making & BreakingWelcome to the wonderful world of code-making and breaking! This is an online book about codes and ciphers. About these, you must read every little bit of it because you want to make codes (and break them), right? If you do, then you should do what I say because every little bit of a code is important to it. So, once you learn these codes, try doing some of the codes on your friends, then see if you can write a whole report in code for your boss or teacher (yeah, right!). All of these are codes crackable with pen and paper, just to let you know. One I've devised myself, and at the end, you get create your own code and e-mail me your code at mactan@gmail.com.
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