Authors
Elie Bursztein, Matthieu Martin, John Mitchell
Publication date
2011/10/17
Book
Proceedings of the 18th ACM conference on Computer and communications security
Pages
125-138
Description
We carry out a systematic study of existing visual CAPTCHAs based on distorted characters that are augmented with anti-segmentation techniques. Applying a systematic evaluation methodology to 15 current CAPTCHA schemes from popular web sites, we find that 13 are vulnerable to automated attacks. Based on this evaluation, we identify a series of recommendations for CAPTCHA designers and attackers, and possible future directions for producing more reliable human/computer distinguishers.
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Scholar articles
E Bursztein, M Martin, J Mitchell - Proceedings of the 18th ACM conference on Computer …, 2011
