Input password method for handicapped people

A password-based authentication is a simple technique used for user authentication of computer or Web services. However, by shoulder surfing passwords can be stolen easily. To prevent these attacks, we need to shield our keypad from view by using our body or cupping our hand. To hide them easily, it is better that keypad itself or the range of inputting keys is small. We propose inputting a password system with only three keys and show an analysis of the security evaluation and results of short user test. Our method can also be utilized for handicapped users who find it hard to use input keys in the regular keyboards.