Title:
DIGITAL WATERMARKING FOR TEXTUAL DATA
Document Type and Number:
WIPO Patent Application WO/2022/056989
Kind Code:
A1
Abstract:
Methods and systems for embedding digital watermark information into textual data arranged in a table of cells are provided. A first subset of cells are selected and for each primary cell key and cell partition number are determined. A portion of a digital watermark ID code is embedded at an embedding position determined based on the cell partition number. Methods and systems for extracting digital watermark information from the textual data are also provided. A cell is fetched and the presence of portion of the digital watermark ID code is determined. A primary cell key and cell partition number are determined. A portion of the digital watermark ID code is extracted at the embedding position within the cell, wherein the embedding position is determined based on the cell partition number. The digital watermarking systems and methods provide tracking for unauthorized copying of the data while modifying only a subset of the data.
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Inventors:
JALALI ROOZBEH (CA)
GUO HAOLIN (CA)
CHEN WEN (CA)
LI MICHAEL (CA)
ZHANG ZANQING (CA)
GUO HAOLIN (CA)
CHEN WEN (CA)
LI MICHAEL (CA)
ZHANG ZANQING (CA)
Application Number:
PCT/CN2020/121722
Publication Date:
March 24, 2022
Filing Date:
October 17, 2020
Export Citation:
Assignee:
HUAWEI CLOUD COMPUTING TECH CO LTD (CN)
International Classes:
G06F21/16
Foreign References:
| CN110874456A | 2020-03-10 | |||
| CN110457873A | 2019-11-15 | |||
| CN110110540A | 2019-08-09 | |||
| US20170329943A1 | 2017-11-16 |
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