Diffie-Hellman Java Implementation

Diffie-Hellman is a cryptographic key agreement algorithm that allows two parties that have no prior knowledge of each other to jointly establish a shared secret key over an insecure communications channel. This key can then be used to encrypt subsequent communications using a symmetric key cipher.

We were asked at cryptography classes to develop such algorithm using the core java libraries. I made a little test – I think they call it jUnit – to prove that both famous Bob and infamous Alice share the same dirty little secret.. :)Source: http://nunojobpinto.googlepages.com/diffie-hellman.zip[EDIT: As Ruben pointed out Diffie-Hellman is vulnerable to man-in-the-middle attacks. This is a purely academic work and - despite the brilliance of the response - is not intended to be used as is. If you want to learn more about this maybe you should read about station-to-station and certificates. In Portuguese you can use the resources given to cryptography masters students at University of Minho]Also if your using Netbeans IDE 6 you are probably noticing that the themes SUCK. I don’t even mean this as it’s not eye-candy, I really mean they hurt the eyes and I am already using glasses due to the overwhelming amount of time I spend at my laptop.To surpass this I advise you to download these files:

• http://mediacast.sun.com/share/tor/org-netbeans-modules-ruby-themes.nbm
• http://www.ibrasten.com/com-superruby-netbeans-themes-fadetogrey.nbm

Now open your very own Netbeans IDE – wait 10 minutes for it to start – and then go to:

• Tools -> Plugins -> Downloaded -> Add

Now add the two files you have just downloaded and change the theme in Tools -> Preferences and you are ready to go.