Secure block-based video authentication with localization and self-recovery

被引：0

作者：

Hassan, Ammar M. ^{[1
]}

Al-Hamadi, Ayoub ^{[1
]}

Hasan, Yassin M. Y. ^{[2
]}

Wahab, Mohamed A. A. ^{[3
]}

Michaelis, Bernd ^{[1
]}

机构：

[1] Institute for Electronics, Signal Processing and Communications (IESK), Otto-von-Guericke-University, Magdeburg, Germany

[2] Computer Science and Information Dept., Taibah University, Madina, Saudi Arabia

[3] Electrical Engineering Department, Minia University, Minia, Egypt

来源：

World Academy of Science, Engineering and Technology | 2009年 / 57卷

关键词：

Multimedia systems - Recovery - Codes (symbols) - Chains - Computer graphics - Hash functions - Public key cryptography;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Because of the great advance in multimedia technology, digital multimedia is vulnerable to malicious manipulations. In this paper, a public key self-recovery block-based video authentication technique is proposed which can not only precisely localize the alteration detection but also recover the missing data with high reliability. In the proposed block-based technique, multiple description coding MDC is used to generate two codes (two descriptions) for each block. Although one block code (one description) is enough to rebuild the altered block, the altered block is rebuilt with better quality by the two block descriptions. So using MDC increases the ratability of recovering data. A block signature is computed using a cryptographic hash function and a doubly linked chain is utilized to embed the block signature copies and the block descriptions into the LSBs of distant blocks and the block itself. The doubly linked chain scheme gives the proposed technique the capability to thwart vector quantization attacks. In our proposed technique, anyone can check the authenticity of a given video using the public key. The experimental results show that the proposed technique is reliable for detecting, localizing and recovering the alterations.

引用

页码：69 / 74