Make an Encryption Program

[Wolfman2307]

Hi,

I want to make a simple encryption program.

My idea is to have an input and an output text box. When the user presses a button the program will encode what is in the input text box and output it into the output text box. I also want to encrypt it with a secret key where the user enters a letter or set of letters into a separate text box which will effect the output. This process can be reversed to decrypt.

I have a few ideas but im hoping someone can help me out.

I have an idea maybe converting the input and key text to an integer, multiplying them which give a long number as an output but im not sure if that is possible.

If anyone has any ideas how i could go about making this id really appreciate it :)

I have a limited knowledge of VB but I have forgotten alot of it

Thanks

[Curtis Rutland]

So, what is this for? Are you needing to encrypt a value in a way that you can reverse the value as well? Or are you just needing to hash a value (like a one-way encryption)?

The .NET Framework already provides tools to do both of these. The System.Security .Cryptography namespace has many useful tools already premade for you.

Honestly, the best resource I can point you towards is google:

http://www.google.com/search?hl=en&q=vb.net+encryption

One problem you'll run into is that most of the algorithms for encrypting strings can result with some non-printable characters, so outputting them may not look the way you think it would.

[tlhintoq]

Just do a google for "msdn cryptography" for the built in crypto namespace. Don't re-invent the wheel when there tools already for it

[mfaisalwarraich]

This is good tutorial with example and may help you:

http://www.devarticles.com/c/a/VB.Net/String-Encryption-With-Visual-Basic-.NET/

[tlhintoq]

There are so many good tutorials out there on this:

http://www.lmgtfy.com/?q=C%23+aes+cryptography+tutorial&ie=UTF-8&oe=UTF-8