Jonathan Bailey at Plagiarism Today is offering a challenge to would-be developers of image Digital Rights Management (DRM) technologies.
DRM is widely believed to be technically impossible by most authorities including Adobe, but this doesn't stop the subject coming up repeatedly on forums and mailing lists as photographers dream of a magic bullet solution for image theft. And apparently it hasn't prevented software engineers from trying. Bailey says he receives about one attempt at DRM every month, however they all fall apart under testing.
Bailey sets reasonable conditions for testing any proposed solutions, and offers a priize of a month's free advertising. Which may not seem much but anyone who really cracks this will be rich as Croesus as soon as they patent and license any successful solution to the world's photolibraries. However we wouldn't place any bets that the prize will ever be collected.
Full details are at Plagiarism Today's site