Six digit PINs are no better for security than four digits

Six-digit security PINs provide little more security than four-digit ones, according to research by a German-US team. It has everything to do with psychology. “Mathematically speaking, there is a huge difference, of course,” said Philipp Markert of Horst Görtz Institute for IT Security at Ruhr-Universität Bochum (photo left). “However, users prefer certain combinations:  some PINs are ...

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