Help!!!

[Moneo]

Moneo:

I tried the code in QuickBASIC 4.5. I had to change the X$ to S$, as the use of X and X$ kept giving me an error.

Then, encryping the simple word "THIS" returns a heart)/2. Now, since the heart is not your "usual" keyboard entry character, it becomes very dificult to de-crypt the encrypted code! I think that an encrypter/decrypter should return only keyboard characters, to make it truly useful. What do you think?

Ralph,
Sorry about the X and X$ issue. Some compilers allow it, others do not. Anyway, that's the way Ethan Winer wrote it.

I don't agree with an encryption algorithm returning only keyboard characters. The purpose of an encryption algorithm is to take a string or record of characters and convert it or scramble it in such a way, using a password, so that the original text will not be recognizable. Of course, you should be able to run the same algorithm and password to convert the encrypted text back to the original.

I have never heard of the requirement that the encrypted text should be keyboard characters only. What's the purpose?

The algorithm is given a text and a password, it produces an encrypted text which can be stored on a file. When you want to decrypt the text, you read the encrypted text from the file, and run the algorithm on it with the same password.

If someone wants to look at the encrypted text, he will use a hex editor, because he will not be expecting keyboard characters.
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