A NOVEL APPROACH OF AUTHENTICATION USING PIXEL VALUE GRAPHICAL PASSWORD SCHEME

Book excerpt: In decades, authentication system is relying on username and password as passphrase object for authentication process. The username and password mechanism bring major problem lately and raising the system developer worries on security for client server communication. Many methods and mechanisms are being introduced to overcome this authentication flaws. One of mechanism that has been introduce is graphical password mechanism on purpose to reduce human memory burden based on psychological study that shows human is better at recognizing and remembering images. However, the current method result many security flaw on graphical password authentication mechanism and require specific tool which is cannot be easily implement on any computer system platform. To overcome current method flaws, pixel value graphical password scheme is being introduced by combining the text-based password mechanism and graphical password mechanism where the authentication system extracting pixel value that resides in a digital image file. The extracted eight bits pixel value is used as the passphrase alongside with username during authentication process. The design and development of this method is based on identified graphical password enhancement and user requirement through literature review analysis. Results on literature analysis are being referred to develop the system flow and system design as the design concept which is being used for prototyping development. The developed prototype is being tested with several collections of image specimens as image experimental testing. Results and output from the testing show promising results as the result for Pixel Value graphical password scheme is bring an extremely positive impact. In other words, pixel value graphical password scheme is bringing graphical password scheme a secure promising authentication implementation.