Title :
Effectiveness of exhaustive search and template matching against watermark desynchronization
Author_Institution :
Dept. of Inf. Eng., Univ. of Siena, Italy
Abstract :
By focusing on a simple example, we investigate the effectiveness of exhaustive watermark detection and resynchronization through template matching against watermark desynchronization. We find that if the size of the search space does not increase exponentially, both methods provide asymptotically good results. We also show that the exhaustive search approach outperforms template matching from the point of view of reliable detection.
Keywords :
data encapsulation; signal detection; synchronisation; watermarking; exhaustive search; geometric attack; template matching; watermark desynchronization; Algorithm design and analysis; Detectors; Discrete Fourier transforms; Discrete cosine transforms; Electrostatic discharge; Random variables; Security; Signal processing; Spread spectrum communication; Watermarking; Exhaustive watermark search; geometric attacks; template matching; watermark synchronization;
Journal_Title :
Signal Processing Letters, IEEE
DOI :
10.1109/LSP.2004.840872
