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ISCAS
2008
IEEE

Advanced colluder detection techniques for OSIFT-based hiding codes

12 years 6 months ago
Advanced colluder detection techniques for OSIFT-based hiding codes
— In this work, we examine a family of anti-collusion codes using the principle of “Orthogonal Spreading followed by the Inverse Fourier Transform (OSIFT)” as introduced in [1], [2]. The Hadamard-Walsh (HW) codes were adopted as the orthogonal spreading codes in [1], [2]. Here, we introduce another type of orthogonal spreading codes; namely, the carrier interferometry (CI) codes, which are comparable to HW codes. To detect OSIFT hiding codes against weighted collusion attacks, we propose advanced detectors that can identify a large number of colluders with weighted collusion attacks. The proposed detection schemes include the maximal ratio combining (MRC) scheme for colluder detection in the same group and the multiuser detection (MUD) scheme for colluder detection in different groups. It is demonstrated that HW- and CI-based OSIFT codes have robust performance with advanced detection schemes against weighted collusion attacks compared with conventional matched filter (MF) in an...
Byung-Ho Cha, C. C. Jay Kuo
Added 31 May 2010
Updated 31 May 2010
Type Conference
Year 2008
Where ISCAS
Authors Byung-Ho Cha, C. C. Jay Kuo
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