The Null Device
New defences against spam
A proposed solution to email spam
, which takes into account advances in character-recognition algorithms (which can now trivially break many "captcha" schemes) and the economics of spammers hiring sweatshop workers to transcribe the codes in question. It involves automatic whitelists, disposable sub-addresses, and are-you-a-human tests based on interpreting computer-rendered scenes involved humanoid figures and flowers.
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