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Journal: International Journal of Engineering Sciences & Research Technology (IJESRT) (Vol.4, No. 8)

Publication Date:

Authors : ; ; ;

Page : 144-156

Keywords : Graphical password; password; hotspots; CaGP; Captcha; dictionary attack; password gues sing attack; security primitive .;

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Many security primitives are based on hard mathematical problems. Using hard AI problems for security is emerging as an exciting new paradigm, but has been under - explored. In this paper, we present a new security primitive based on hard AI problems, namely, a novel family of graphical password systems built on top of Captcha technology, which we call Captcha as graphical passwords (CaGP). CaGP is both a Captcha and a graphical password scheme . CaGP addresses a number of security problems altogether, such as online guessing attacks, relay attacks, and, if combined with dual - view technologies, shoulder - surfing attacks. Notably, a CaGP password can be found only probabilistically by automatic onl ine guessing attacks even if the password is in the search set. CaGP also offers a novel approach to address the well - known image hotspot problem in popular graphical password systems, such as PassPoints, that often leads to weak password choices. CaGP is not a panacea, but it offers reasonable security and usability and appears to fit well with some practical applications for improving online security.

Last modified: 2015-08-06 19:45:02