A new image secret sharing scheme to identify cheaters

Authors:
Rong Zhao;Jian-jie Zhao;Fang Dai;Feng-qun Zhao
Affiliations:
School of Sciences, Xi'an University of Technology, Xi'an 710054, People's Republic of China;School of Information and Security Engineering, Shanghai Jiaotong University, Shanghai 200240, People's Republic of China;School of Sciences, Xi'an University of Technology, Xi'an 710054, People's Republic of China;School of Sciences, Xi'an University of Technology, Xi'an 710054, People's Republic of China
Venue:
Computer Standards & Interfaces
Year:
2009

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Abstract

A verifiable image secret sharing scheme, which is based on the Thien-Lin scheme and the intractability of the discrete logarithm, is proposed in this paper. The new scheme can identify the cheaters no matter if she/he is the original secret image holder or the participant; because each participant chooses her/his own secret shadow by her/himself, the new system doesn't need a security channel; Due to the same fact, the secret shadow of each participant can be reused. In addition, the size of each shadow image, same as the Thien-Lin scheme, is smaller than that of the original secret image.