Tim Perdue writes about a new PHP library he's written. "When I started seeing spam messages posted to the new column annotation system, I knew I would have to create some sort of user authentication system that helps weed out . . .
Tim Perdue writes about a new PHP library he's written. "When I started seeing spam messages posted to the new column annotation system, I knew I would have to create some sort of user authentication system that helps weed out the losers. ... So the new system needed to rely on cookies while not being totally exploitable. It was an interesting dilemma. I knew I couldn't simply set a user_name cookie when they logged in (the user name cookie is easy to spoof). I also knew I didn't want to set a simple hash and have to confirm that hash against my database."

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