Though security industry experts were freely predicting the death of spam several years ago, the arrival of image-based attacks has resulted in a stunning renaissance in the volumes of unwanted e-mail reaching end-users' inboxes. And while filtering technologies have improved significantly and can thwart the ability of most image spam to force its way onto corporate networks today, some experts believe that the fight against the use of such AI (artificial intelligence) tactics on the part of spammers is only just getting underway...

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