Sciweavers

Share
CCS
2010
ACM

Scene tagging: image-based CAPTCHA using image composition and object relationships

8 years 9 months ago
Scene tagging: image-based CAPTCHA using image composition and object relationships
In this paper, we propose a new form of image-based CAPTCHA we term "scene tagging". It tests the ability to recognize a relationship between multiple objects in an image that is automatically generated via composition of a background image with multiple irregularly shaped object images, resulting in a large space of possible images and questions without requiring a large object database. This composition process is accompanied by a carefully designed sequence of systematic image distortions that makes it difficult for automated attacks to locate/identify objects present. Automated attacks must recognize all or most objects contained in the image in order to answer a question correctly, thus the proposed approach reduces attack success rates. An experimental study using several widely-used object recognition algorithms (PWD-based template matching, SIFT, SURF) shows that the system is resistant to these attacks with a 2% attack success rate, while a user study shows that the...
Peter Matthews, Cliff Changchun Zou
Added 02 Sep 2010
Updated 02 Sep 2010
Type Conference
Year 2010
Where CCS
Authors Peter Matthews, Cliff Changchun Zou
Comments (0)
books