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Microsoft's Picture Password provides a method to authenticate a user without the need of typing a character based password. The password consists of a set of gestures drawn on an image. The position, direction and order of these gestures constitute the password. Besides being more convenient to use on touch screen devices, this authentication method promises improved memorability in addition to improving the password strength against guessing attacks. However, how unpredictable is the picturedoi:10.1109/icip.2013.6738916 dblp:conf/icip/SadovnikC13 fatcat:t3mnprowfrhyzghknbjut73u4q