Captcha as graphical passwords:a new security primitive based on hard AI problems

Zhu, Bin B. and Yan, Jeff and Bao, Guanbo and Yang, Maowei and Xu, Ning (2014) Captcha as graphical passwords:a new security primitive based on hard AI problems. IEEE Transactions on Information Forensics and Security, 9 (6). pp. 891-904. ISSN 1556-6013

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Abstract

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 (CaRP). CaRP is both a Captcha and a graphical password scheme. CaRP 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 CaRP password can be found only probabilistically by automatic online guessing attacks even if the password is in the search set. CaRP 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. CaRP is not a panacea, but it offers reasonable security and usability and appears to fit well with some practical applications for improving online security.

Item Type:
Journal Article
Journal or Publication Title:
IEEE Transactions on Information Forensics and Security
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200/2213
Subjects:
ID Code:
77671
Deposited By:
Deposited On:
14 Jan 2016 15:08
Refereed?:
Yes
Published?:
Published
Last Modified:
17 Sep 2020 02:38