Textual passwords are the widespread method used for confirmation. But textual passwords are defenseless to eves dropping, dictionary attacks, social engineering and shoulder surfing. Graphical passwords are introduced as substitute techniques to textual passwords. Most of the graphical schemes are susceptible to shoulder surfing. To tackle this problem, text can be combined with images or colors to create passwords for authentication. In this paper, we discussed technique to generate passwords using text, colors and images which are opposing to shoulder surfing. These methods are suitable for Personal Digital Assistants.

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Authentication Session Passwords Shoulder Surfing