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POPassword as private key for IM
 

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    <p>due to all this surveillance on the internet I was planning on writing a complete opensource, cross-platform and fully encrypted chat client including video functionality.</p> <p>Similar to Skype, but messages and video stream should be fully encrypted and all communication must only occurs between the clients itself and never need to go through any server.</p> <p>The registration, authentication and online checking, however needs to be done server-side to keep it simple and usable also for beginners.</p> <p>So to keep it as simple as possible I was gonna go for public/private key encryption. In order not to store the private key anywhere on the server and also not to carry it to each computer you want to log on, I thought about making password as the private key. This way you could log on where ever you want and do not have to worry about the key.</p> <p>If you add a person, you will then automatically send him/her your public key. If he/she accepts, he/she will respond with her/his public key and then you can both chat/video-call.</p> <p><strong>The problem I am seeing here is:</strong></p> <ul> <li>How can I remain the public key when changing my password (the private key)?</li> <li>Can I use existing SSL Infrastructure to achieve this, without having to re-implement any encryption standard?</li> </ul> <p>I have already a couple of people willing to help programming (C/C++), but unfortunately none of us is pretty keen on the encryption technology, so I will need to sort those things first. Once I know how to implement the encryption I will publish a diagram and ask for feedback about that.</p> <p>Thanks in advance.</p>
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