nunojob:~ dscape/08$ echo The Black Sheep

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:

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.

Comments on: "Diffie-Hellman Java Implementation" (5)

  1. Take care, the Diffie-Hellman is completely vulnerable to man-in-the-middle attacks!

    It must be used with another cryptographic technique, or you may see yourself talking to a Eve :-)

  2. Perhaps you should consider using Eclipse instead :-)

    Btw, the link to the source is broken.

    Cheers,
    PP

  3. kalo pake dotnet programnya gimana

  4. […] bu konudaki sayfasını inceleyebilirsiniz. Diffie Hellman hakkında başka bir yazıyı bu sayfada bulabilirsiniz. Burada da konuyla ilgili bir makale […]

  5. Help i want to run DH code in network for sending messages using encryption and decryption..DH will be used as key aggrement

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