Computing Science: The Robustness of Google CAPTCHAs (Englisch)

We report a novel attack on two CAPTCHAs that have been widely deployed on the Internet, one being Google's home design and the other acquired by Google (i.e. reCAPTCHA). With a minor change, our attack program also works well on the latest ReCAPTCHA version, which uses a new defence mechanism that was unknown to us when we designed our attack. This suggests that our attack works in a fundamental level. Our attack appears to be applicable to a whole family of text CAPTCHAs that build on top of the popular segmentation-resistant mechanism of 'crowding character together' for security. Next, we propose a novel framework that guides the application of our well-tested security engineering methodology for evaluating CAPTCHA robustness, and we propose a new general principle for CAPTCHA design.

Wie erhalte ich diesen Titel?
TIB vor Ort

Für Benutzerinnen und Benutzer auf dem LUH Campus überprüfen wir gerne den kostenfreien Bezug.

Anfrage Verfügbarkeit LUH


Ähnliche Titel