Countering code-injection attacks with instruction-set randomization
Proceedings of the 10th ACM conference on Computer and communications security
Recognizing objects in adversarial clutter: breaking a visual captcha
CVPR'03 Proceedings of the 2003 IEEE computer society conference on Computer vision and pattern recognition
Honey@home: a new approach to large-scale threat monitoring
Proceedings of the 2007 ACM workshop on Recurring malcode
CMS'10 Proceedings of the 11th IFIP TC 6/TC 11 international conference on Communications and Multimedia Security
AniCAP: an animated 3d CAPTCHA scheme based on motion parallax
CANS'11 Proceedings of the 10th international conference on Cryptology and Network Security
Review: Analyzing well-known countermeasures against distributed denial of service attacks
Computer Communications
Breaking an animated CAPTCHA scheme
ACNS'12 Proceedings of the 10th international conference on Applied Cryptography and Network Security
All your face are belong to us: breaking Facebook's social authentication
Proceedings of the 28th Annual Computer Security Applications Conference
A survey and analysis of current CAPTCHA approaches
Journal of Web Engineering
Animated CAPTCHAs and games for advertising
Proceedings of the 22nd international conference on World Wide Web companion
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Completely Automated Public Turing Test to tell Computers and Humans Apart (CAPTCHA) is a –rather– simple test that can be easily answered by a human but extremely difficult to be answered by computers. CAPTCHAs have been widely used for practical security reasons, like preventing automated registration in Web-based services. However, all deployed CAPTCHAs are based on the static identification of an object or text. All CAPTCHAs, from simple ones, like typing the distorted text, to advanced ones, like recognizing an object in an image, are vulnerable to the Laundry attack. An attacker may post the test to a malicious site and attract its visitors to solve the puzzle for her. This paper focuses on sealing CAPTCHAs against such attacks by adding a dimension not used so far: animation. Animated CAPTCHAs do not have a static answer, thus even when they are exposed to laundering, unsuspected visitors will provide answers that will be useless on the attacker's side.