563.10.3 captcha

563.10.3 CAPTCHA Presented by: Sari Louis SPAM Group: Marc Gagnon, Sari Louis, Steve White University of Illinois Spring 2006

Agenda ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Definition ,[object Object],[object Object],[object Object]

Background ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Background ,[object Object],[object Object],[object Object],[object Object]

Background - Papers ,[object Object],[object Object],[object Object],[object Object]

Applications ,[object Object],[object Object],[object Object],[object Object],[object Object]

Types of CAPTCHAs ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Text Based CAPTCHAs ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Graphic Based CAPTCHAs ,[object Object],[object Object],[object Object],[object Object],[object Object]

Graphic Based CAPTCHAs ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Graphic Based CAPTCHAs Dog Pool

Audio Based CAPTCHAs ,[object Object],[object Object],[object Object],[object Object]

Breaking CAPTCHAs ,[object Object],[object Object],[object Object],[object Object]

Proposed Approach ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Proposed Approach - Technical ,[object Object],[object Object],[object Object],[object Object],[object Object]

Proposed Approach - Benefits ,[object Object],[object Object],[object Object],[object Object],[object Object]

Proposed Approach - Drawbacks ,[object Object],[object Object],[object Object]

563.10.3 captcha

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