CAPTCHA image scramble
US9635019B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 7, 2016 |
| Grant date | Apr 25, 2017 |
| Priority date | — |
| Expiry date | Mar 7, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/179
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In one embodiment, a client computing device receives information regarding a Completely Automated Public Turing Test to Tell Computers and Humans Apart (CAPTCHA). The CAPTCHA includes an image file, a challenge, and code that is executable by a web browser to unscramble the received image file. The code includes instructions to divide the received image file into image sections, each image section having a unique identifier and grouped into either a first set or a second set. The code further contains instructions to transpose each image section in the first set into a new position, creating a new image. A web browser of the client computing device executes the code to create a second image from the received image file. The second image and the challenge are presented to a user of the client computing device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.