Security experts say it's not about getting to a level of perfect security, an impossibility. The realistic goal is to minimize risk as much as possible. People find it hard to remember and multiple passwords and user names so they get sloppy — they share and duplicate passwords — and that leads to risk. Nok Nok's tools could be one way to alleviate it.
http://gigaom.com/2013/02/11/security-startup-nok-nok-labs-wants-to-rid-the-world-of-passwords/
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