Unique identification of visitiors (IP change detection)

Avg Bid (USD)
Project Budget (USD)
$30 - $250

Project Description:
We operate chatbox and forums. When we ban users they must nog get back registered again under a new ip/email adres.
We need a javascript that creates a unique hash based on available information: HTTP-AGENT, HTTP-ACCEPT-HEADER, Browser plugin details.
So if a person changes his ip adres he is still recognized.

Skills required:
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