> Encrypts & Decrypts text file and stores the plain text in a text with VB
 

I want to do it with VB.NET to DES or AES or RSA.

like this:

Encrypts the content of a text file and stores the cipher in another text file.
Decrypts a cipher stored in a text file and stores the plain text in a text file.
Your program should read from the user the path of the cipher and the plain text along with the key and either he/she wishes to encrypt or decrypt.
You may use one of the following languages to develop your program: C++, JAVA or VB.NET.
If you got the help of any packages or ready code, pleas mention it and provide all the resource you've used.
You can chose on or more of these algorithms to encrypt or decrypt.
o DES.
o AES.
o RSA.

First of all you should keep in mind that DES and AES are symmetric crypto algorithms, and RSA is asymmetric - so the notion of a "crypto key" doesn't really exist here since you have both public and private key.

Apart from that: OpenSSL's libcrypto should implement all three ciphers and you should at least use it through C++. I don't know if there are any NET bindings for the library, but I doubt it.

NET sucks anyway, and so does VB. If you really only want to prototype an application or just hack away -> use Python. Pretty easy to use, a huge standard library and lots of modules.

If you have to use VB.NET, then I can't help you.

thanks anyway I'm already finished it