Title :
A Study of Rounding Error on CDMA-Based Fingerprinting Scheme
Author :
Kuribayashi, Minoru ; Kato, Hiroshi ; Morii, Masakatu
Author_Institution :
Grad. Sch. of Eng., Kobe Univ., Kobe, Japan
Abstract :
On the spread spectrum fingerprinting, it has been considered that the energy of embedded signal is dropped to 1/c of its original value when c copies are averaged. In this study, we analyze the effects of rounding error occurred at the embedding and averaging. The truncation of the number of decimals causes non-linear changes on the frequency components of fingerprint sequence. We estimate the actual attenuation factor through our simulation, and provide the best and worst case. In order to avoid the worst case, the countermeasure is proposed in this paper.
Keywords :
code division multiple access; fingerprint identification; CDMA-based fingerprinting scheme; code division multiple access; spread spectrum fingerprinting; Attenuation; Computational efficiency; Discrete cosine transforms; Fingerprint recognition; Frequency; Multiaccess communication; Roundoff errors; Signal processing; Spread spectrum communication; Watermarking; collusion attack; fingerprinting; rounding error;
Conference_Titel :
Intelligent Information Hiding and Multimedia Signal Processing, 2009. IIH-MSP '09. Fifth International Conference on
Conference_Location :
Kyoto
Print_ISBN :
978-1-4244-4717-6
Electronic_ISBN :
978-0-7695-3762-7
DOI :
10.1109/IIH-MSP.2009.47
