Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/43792
標題: A CHEAT-PREVENTING VISUAL CRYPTOGRAPHY SCHEME BY REFERRING THE SPECIAL POSITION
作者: Tsai, C.S.
蔡垂雄
Wang, H.C.
Wu, H.C.
Wang, C.M.
關鍵字: Visual cryptography
Visual secret sharing
Cheat-preventing
secret sharing schemes
gray-level images
multiple secrets
protection
scheme
color images
random grids
encryption
期刊/報告no:: International Journal of Innovative Computing Information and Control, Volume 7, Issue 7A, Page(s) 3923-3937.
摘要: Visual cryptography (VC) is an effective and a secure scheme for sharing a secret image with the participants. VC scheme encodes the secret image into the shares. Each participant holds one share. When the participants stack a sufficient number of shares, the secret image can be decrypted through the human visual system. However, in some situations, cheating is possible in the VC scheme. The dishonest participant, called a cheater, may provide a fake secret image to cheat the other participants. In this paper, we proposed a cheating scheme to prove that the cheater can cheat other participants in Hu and Tzeng's cheat-prevention scheme [1]. To achieve cheat-prevention in VC, we propose a novel transformation scheme. The proposed scheme can recognize the fake share by stacking shares in a special position in the verification stage. In our scheme, we can improve Hu and Tzeng's cheat-preventing scheme and transform the existing VC scheme into the cheat-prevention scheme. Moreover, our scheme does not need an extra verification share which would reduce the burden of share management for each participant.
URI: http://hdl.handle.net/11455/43792
ISSN: 1349-4198
Appears in Collections:資訊管理學系

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