Method and system for embedding covert data in text document using character rotation
US8402371B2 · kind B2 · utility
5Cited by
1References
24Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 17, 2009 |
| Grant date | Mar 19, 2013 |
| Priority date | — |
| Expiry date | Oct 6, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/22
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and system for embedding data covertly in a text document using character rotation encoding. A character that occurs in first and second occurrences is selected, where the first occurrence of the character is a reference character and the second occurrence of the character as a rotatable character. The rotational orientation of the rotatable character is altered to produce an altered character with a predetermined rotation with respect to the reference character, wherein the rotation represents the embedded covert data. A text document is formatted based on the altered character.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.