Z
Zhihao Zhang
Researcher at Tsinghua University
Publications - 7
Citations - 144
Zhihao Zhang is an academic researcher from Tsinghua University. The author has contributed to research in topics: Digital watermarking & Watermark. The author has an hindex of 6, co-authored 7 publications receiving 142 citations.
Papers
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Proceedings ArticleDOI
Watermarking relational database using image
TL;DR: A novel watermarking method is proposed, which embeds an image watermark into relational database, and experimental results verify the effectiveness of the proposed method.
Journal Article
An Improved Algorithm to Watermark Numeric Relational Data
TL;DR: An improved algorithm to watermark numeric attributes in relational databases for copyright protection is studied and an improved insertion algorithm, a detection algorithm and a recover algorithm are presented, which introduce a varied-size grouping method in their insertion algorithm to insert a meaningful watermark.
Book ChapterDOI
An improved algorithm to watermark numeric relational data
TL;DR: Wang et al. as discussed by the authors proposed an improved algorithm to watermark numeric attributes in relational databases for copyright protection, which can be validated in a detection algorithm to decide whether a watermark exists or not, and a competing mechanism to help recover the exact meaningful watermark after the detection result confirms the existence of the watermark.
Book ChapterDOI
Watermarking spatial trajectory database
TL;DR: A novel watermarking method is proposed, which embed the watermark information by introducing a small error to the trajectory shape rather than certain data values.
Patent
Method for embedding and extracting watermark in English texts
TL;DR: In this paper, a method for embedding and extracting water spot from English text in the field of text copyright protection technique was proposed, which has the following steps: changing the copyright information into binary bit string, reading in the text and filtering special characters and indent and then operating the character string and copyright person's private key to obtain integer number Z, if Z can divide embedding ratio exactly, the next sentence is water spot information sentence.