graphical-passwords authentication
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Transcript of graphical-passwords authentication
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Graphical Passwords
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Graphical Passwords
(1) Why graphical passwords? Pictures are easy to remember or recognizedthan text..
(2) Are graphical passwords as secure as textpasswords?
(3) What are the major design and implementation
issues for graphical passwords?
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Random Image
Based on hash visualization techniques.
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Passfaces
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Passlogix
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Pass Point
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Based on JPEG
2000
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Random Image
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Random Image
Based on hash visualization techniques.
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Draw-A-Secret (DAS)
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Drawing Grid
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Graphical Passwords Design
Recognition Based Techniques
Recall Based Techniques(1) Produce a drawing(2) Repeat a sequence of actions
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Attack on Graphical Passwords
(1) Brute force search(2) Dictionary attacks(3)Guessing * diferent person has diferent choice. * human have some common selections.(4) Spy ware(5)Shoulder surfing(6) Social engineering
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Research on Graphical Passwords
(1) Design a new graphical password scheme * can return a random length text password
(2) Use graphical password in public keycryptosystem. * User generate a big number from graphicalpassword. * Convert the big number into a signing private
key. * Get a certificate from CA with the generatedkey. * Embed graphical password into applicationsuch as webmail. * User log on webmail, generate his signing key
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