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

fYear

2009

fDate

12-14 Sept. 2009

Firstpage

1286

Lastpage

1289

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/IIH-MSP.2009.47

Filename

5337196