Re: Can You Write a Sure-fire Algorithm to Stop Bots?
Dave's idea doesn't work, because you can boot the CD from a virtual machine and run the bot on the supervisor OS. If the client takes pains to verify it's not virtualized, you can attach an IP-KVM to a physical machine and run the bot against the KVM viewer.
Random pop-up catchas don't work because it's worth it for a human to sit there and respond to them on 20 PC's.
Having every card be a captcha (or, more generally, making the whole play area an ever-changing visual puzzle) is probably the most effective and practical solution.
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