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论文类型：期刊论文

发表时间：2016-01-01

发表刊物：MATHEMATICAL PROBLEMS IN ENGINEERING

收录刊物：SCIE、EI

卷号：2016

ISSN号：1024-123X

摘要：In secret image sharing schemes, the thresholdmay have to be adjusted in case of changes in the security policy and the adversary structure before recovering the secret image. For example, if participants leave the group, their stego images are useless to them andmay not be kept safely. As a result, these images can be easily stolen and utilized by intruders, which reduces the security of the scheme. To solve this problem, we propose a novel threshold changeable secret image sharing scheme with.. potential changeable thresholds t(1), t(2),...,...., t(N) By preparing advance shares for thresholds t(1), t(2),...,..t(N) and using the two-variable one-way function to generate the identification value, we can change the threshold when necessary. The experiments show that the quality of the stego images in our scheme is satisfactory and the secret image can be recovered without distortion. Moreover, the security analysis shows that we can change the threshold safely.