Educated guess on graphical authentication schemes: vulnerabilities and countermeasures

Recognition-based graphical passwords are common alternatives to alphanumeric passwords for user authentication. Previously, we proposed culturally familiar recognition-based graphical passwords using pictures that relate to users' backgrounds. This ...

Currently most picture based authentication methods are vulnerable to shoulder surfing attack. The only project known so far countering this problem is Graphical Password by L. Sobrado at Rutgers University. But their scheme still have a drawback, it ...

Classical password/PIN-based authentication methods have proven to be vulnerable to a broad range of observation attacks (such as key-logging, video-recording or shoulder surfing attacks). In order to mitigate these attacks, a number of solutions have ...