A Spelling Based CAPTCHA System by Using Click

CAPTCHA has been widely used for preventing malicious programs to access web resources automatically. In this paper, a new type CAPTCHA system will be proposed. The proposed scheme, named Click spell, combined the features of text-based and image-based CAPTCHAs. Click spell asks users to spell a randomly chosen word by clicking distorted letters for passing the test. Users can learn the definition(s) of the chosen word. In addition, Click spell can add an advertisement image optionally. Thanks to the advertisement image, Click spell improved the capability of resistance to the attack by malicious programs. Our preliminary test showed that Click spell is practical in the aspects of security and usability.

[1]  Alessandro Basso,et al.  Preventing massive automated access to web resources , 2009, Comput. Secur..

[2]  Rich Gossweiler,et al.  WWW 2009 MADRID! Track: User Interfaces and Mobile Web / Session: User Interfaces What’s Up CAPTCHA? A CAPTCHA Based on Image Orientation , 2022 .

[3]  Peter Matthews,et al.  Scene tagging: image-based CAPTCHA using image composition and object relationships , 2010, ASIACCS '10.

[4]  Jeff Yan,et al.  Usability of CAPTCHAs or usability issues in CAPTCHA design , 2008, SOUPS '08.

[5]  Ran Canetti,et al.  POSH: a generalized captcha with security applications , 2008, AISec '08.

[6]  J. Doug Tygar,et al.  Image Recognition CAPTCHAs , 2004, ISC.

[7]  Mariano Gallo,et al.  Application of Metaheuristics to Large-Scale Transportation Problems , 2013, LSSC.

[8]  M. Tariq Banday,et al.  Image flip CAPTCHA , 2009, ISC Int. J. Inf. Secur..

[9]  Karolj Skala,et al.  Quantum Random Bit Generator Service for Monte Carlo and Other Stochastic Simulations , 2007, LSSC.

[10]  V. Srikanth,et al.  Think-an image based CAPTCHA mechanism (testifying human based on intelligence and knowledge) , 2009, ICAC3 '09.

[11]  Jon Howell,et al.  Asirra: a CAPTCHA that exploits interest-aligned manual image categorization , 2007, CCS '07.

[12]  Venu Govindaraju,et al.  Synthetic handwritten CAPTCHAs , 2009, Pattern Recognit..

[13]  Dimitris Gritzalis,et al.  Audio CAPTCHA: Existing solutions assessment and a new implementation for VoIP telephony , 2010, Comput. Secur..

[14]  J. van Leeuwen.  Large-Scale Scientific Computing: Third International Conference, LSSC 2001 Sozopol, Bulgaria, June 6–10, 2001 Revised Papers , 2001, LSSC.