Strong Protection for Weak Passwords

Max Planck Institute researchers have developed a password protection system based on a combination of characters and a Completely Automated Public Turing test to tell Computers and Humans Apart (CAPTCHA). The researchers also used mathematical techniques from the physics of critical phenomena to make the CAPTCHA safer. "We thus make the password protection both more effective and simpler," says Max Planck researcher Konstantin Kladko. The researchers used the CAPTCHA in the image, which can only be solved by humans, as the actual password. They further encrypted the password using a combination of characters. The team then let the system develop chaotically for a period of time, resulting in an image that no longer contains a recognizable word. Although the new system only requires relatively weak passwords, the real strength is in the CAPTCHA's encrypted password, according to the researchers.

source -  http://www.mpg.de/2823498/effective_password_protection?filter_order=L


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