TY - GEN
T1 - A new soft decision tracing algorithm for binary fingerprinting codes
AU - Kuribayashi, Minoru
PY - 2011/11/9
Y1 - 2011/11/9
N2 - The performance of fingerprinting codes has been studied under the well-known marking assumption. In a realistic environment, however, a pirated copy will be distorted by an additional attack. Under the assumption that the distortion is modeled as AWGN, a soft decision method for a tracing algorithm has been proposed and the traceability has been experimentally evaluated. However, the previous soft decision method works directly with a received signal without considering the communication theory. In this study, we calculate the likelihood of received signal considering a posterior probability, and propose a soft decision tracing algorithm considering the characteristic of Gaussian channel. For the estimation of channel, we employ the expectation-maximization algorithm by giving constraints under the possible collusion strategies. We also propose an equalizer to give a proper weighting parameter for calculating a correlation score.
AB - The performance of fingerprinting codes has been studied under the well-known marking assumption. In a realistic environment, however, a pirated copy will be distorted by an additional attack. Under the assumption that the distortion is modeled as AWGN, a soft decision method for a tracing algorithm has been proposed and the traceability has been experimentally evaluated. However, the previous soft decision method works directly with a received signal without considering the communication theory. In this study, we calculate the likelihood of received signal considering a posterior probability, and propose a soft decision tracing algorithm considering the characteristic of Gaussian channel. For the estimation of channel, we employ the expectation-maximization algorithm by giving constraints under the possible collusion strategies. We also propose an equalizer to give a proper weighting parameter for calculating a correlation score.
UR - http://www.scopus.com/inward/record.url?scp=80455127244&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80455127244&partnerID=8YFLogxK
U2 - 10.1007/978-3-642-25141-2_1
DO - 10.1007/978-3-642-25141-2_1
M3 - Conference contribution
AN - SCOPUS:80455127244
SN - 9783642251405
T3 - Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
SP - 1
EP - 15
BT - Advances in Information and Computer Security - 6th International Workshop, IWSEC 2011, Proceedings
T2 - 6th International Workshop on Security, IWSEC 2011
Y2 - 8 November 2011 through 10 November 2011
ER -