Classical Cipher Program?

ROT13

Type "web ROT13" into google to get an actual site that decodes/encodes.

xor is my hero.

Perfect!

Keep in mind that some people can read rot13; literally able to read it without needing it decoded. If your personal information really is that personal, you might want to go with another scheme.

An appropriate key for a one-time pad cypher can encrypt any passage into any other passage of plain, readable text.

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Original post by SiCrane Keep in mind that some people can read rot13; literally able to read it without needing it decoded.

Wait, really?

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Original post by think_different Quote: Original post by SiCrane Keep in mind that some people can read rot13; literally able to read it without needing it decoded. Wait, really?

Does this surprise you? Remember, people can speak/read Klingon...

@OP, why are you putting personal information on the poster?

You obviously haven't spent a lot of time on Usenet, have you?

Well, we're all programmers. Write up a simple file-reading program that reads it to a char, and then take each character and add a certain number to its ascii value, and, voiloa, encrypted text! Say, do a rot19 ;)

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Original post by brandonman Well, we're all programmers. Write up a simple file-reading program that reads it to a char, and then take each character and add a certain number to its ascii value, and, voiloa, encrypted text! Say, do a rot19 ;)

Vigenère cipher
Online encode/decode

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Original post by xor ROT13 Type "web ROT13" into google to get an actual site that decodes/encodes.

Haha I was thinking exactly that as I was reading the OP's post.

A note to the original poster. It doesn't matter what algorithm you use, if you have a single letter replaced by a single different letter throughout the whole thing, anyone determined enough could read it. Like even if all your A's = N's, Z's = B's, K's = I's, S's = A's, etc...

All anyone would have to do is some simple decoding and could do it within 30 minutes easily. They would just have to target small simple or repeated characters/words. A single character by itself is likely only going to be either an A or I, then it's just a matter of trial and error trying to plug that in and completing other words. So simply transforming a letter to a different letter/symbol/number etc won't cut it if you don't want your information possibly figured out.

If you're going to do that, you might want to also shift everything around a few times in some sort of matrix configurations so it's scrambled and even if they did figure out what all the now a bit more non-sensical letters were somehow, they still would have to unscramble it to get the original text.

Dunno if its mentioned already, but why not use a password in addition to XOR? You cycle through the letters of the password and add the ascii value to the already XOR'd text. I don't think you'll see a pattern in the text.

You could just use a rot13 or whatever system, and code lorum ipsum. Why is the university saying that you must code personal information? Or is it just your idea? Its a bad one.

Use a Bacon Cipher. I would think it particularly appropriate to a typography project.