Java Encryption

You are to write a small (and hopefully simple) application. Your application is

intended to be somewhat similar to the “GPass” program from the Gnome2

application suite. The intention is simple: you have a password and some textual

information. The text is encrypted with the password and the data stored in a file. The

same password when given will decrypt the information (play with GPass if you like).

It is not the intention of this assignment that your code be sophisticated- it just needs

the basic functionality – prompt for a password, decrypt the file and display it. That is

sufficient. GPass itself is vastly more than I would envision any of you writing.

You can implement whatever nice enhancements you see fit for your program, but try

to keep it reasonably simple.

You must provide a manual for your program. This manual must cover how to build

the application from source, how you would see it installed and used (clearly: it is not

going to be something that could easily integrate with say Gnome like GPass can);

and a clear user manual for the program.

Your code must be clear and well commented.

Your code should be as cross platform as is possible. So you can use Java and then

use WxWindows or similar to provide cross platform windowing. Your code should

be able to run on Linux or Windows platform.

How to

I’m not going to explain how to get a “pop up window” or anything like that, but the

Cryptographic code needs an explanation. While you debug your code, write your

own Cryptographic code that meets whatever CryptoAPI you have chosen and does

nothing more than return the buffer passed with (say) case inverted. This will permit

you to debug whatever problems you might have without having to deal with 8 bit

binary junk. Substitute the real crypto when you get it working. In essence, all the

cryptoAPIs are the same and take the form of:

[url removed, login to view](buffer, password)

so it isn’t “rocket science”.

Please note carefully: you do not have to write your own crypto code. I want you

to use an existing API and code. Indeed, it is a very bad idea to even think about

writing your own cryptographic code!


Since this is a security course and since you are trying to encrypt something (and

decrypt it) you should make some effort to not reveal the password.

Please bid accordingly. Higher bid will not be considered.

Taidot: Java

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