Journal of Applied Sciences ›› 2012, Vol. 30 ›› Issue (5): 524-530.doi: 10.3969/j.issn.0255-8297.2012.05.014

• Signal and Information Processing • Previous Articles     Next Articles

A Novel Invisible and Private Flow Watermarking Scheme

ZHANG Lian-cheng, WANG Zhen-xing, XU Jing   

  1. College of Information Engineering, PLA Information Engineering University, Zhengzhou 450002, China
  • Received:2011-02-15 Revised:2011-10-13 Online:2012-09-24 Published:2012-09-25

Abstract:

Existing active flow watermarking techniques introduce significant delays to target flows, enabling attackers to detect and remove the inserted watermark from the flow, and even duplicate them to unmarked flows. We propose a novel invisible and private flow watermarking scheme that embeds watermarks in randomly chosen inter-packet delay positions. Different pseudo-noise codes are used across multiple network flows
by slightly manipulating the arrival times of the packets. Theoretical analysis and experimental results demonstrate that the proposed scheme is robust against timing perturbation, effective in detecting multiple network flows, and invisible to timing analysis attack based on the Kolmogrov-Smirnov test.

Key words: private flow watermarking, inter-packet delay, spread spectrum, Kolmogrov-Smirnov test

CLC Number: