CAPTCHA image scramble
US8209743B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 9, 2010 |
| Grant date | Jun 26, 2012 |
| Priority date | — |
| Expiry date | Feb 26, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/179
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In one embodiment, accessing a first image of a CAPTCHA, wherein the CAPTCHA comprises: the first image; a challenge based on the first image; and a correct response based on the first image; constructing a second image by scrambling the first image, comprising: cutting the first image into a plurality of image sections; recording positions of the image sections in the first image; and randomly rearranging the image sections to construct the second image; generating web-browser-executable code for unscrambling the second image back to the first image, wherein the web-browser-executable code indicates, for each one of the image sections in the second image, the position of the image section in the first image; and transmitting the second image and the web-browser-executable code to a second computing device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.