One of the most daunting and challenging tasks with whichour memory has to cope on an almost daily basis is remembering passwords.Modern life surrounds us with passwords, for almost any activity we need tocarry out, be it ordering books on the web, entering out computer at work oropening our free email service account from any computer other than our own. Weneed to provide strong passwords for using each of these services or computers,but we also have to make these passwords memorable, and desirably intuitive.