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A new CAPTCHA relocating image layers by exploiting logical thinking

IP.com Disclosure Number: IPCOM000236502D
Publication Date: 2014-Apr-30
Document File: 5 page(s) / 127K

Publishing Venue

The IP.com Prior Art Database


This disclosure discloses a CAPTCHA solution for user to easily pass the challenge and still keep the security capability. The solution offers an image composed by two layers. And there will be an obvious logical error or an instruction. With the basic logical thinking, user can perform one drag operation to change the relative position of the two layers to form a new image. The new image will correct the error or follow the instruction, then the test is passed.