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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/101043


    Title: New Designs for Friendly Visual Cryptography Scheme
    Authors: 侯永昌;Z.Y. Quan;H.Y. Liao
    Contributors: 淡江大學資訊管理學系
    Keywords: friendly visual secret sharing, secret sharing, visual cryptography
    Date: 2015-01-01
    Issue Date: 2015-03-25 13:47:03 (UTC+8)
    Publisher: Singapore: International Association of Computer Science and Information Technology
    Abstract: Different from conventional cryptography, visual cryptography is an image cryptographic technique proposed by Naor and Shamir. It encodes a secret image into n pieces of noise-like shares. When k or more than k pieces of shares are gathered from participants, human visual system will disclose the secret image on the stacked image easily. Neither complicated mathematical computation nor any knowledge of cryptography are needed are the main advantages of visual cryptography. In this paper, we propose a new design for friendly visual cryptography scheme. The secret will be hiding into two meaningful shares. The black-appearing ratio in each block of the shares for the corresponding black (rep. white) secret pixel is the same. Therefore, it is impossible for one to disclose any information related to the secret image on each share, which achieves the goal of improving security. When shares are superimposed, the contours of the cover image will disappear on the stacked image, which will only reveal the secret image. According to our experimental results, the contrasts of the shares or the stacked images are good which can reveal the contents of the cover images and the secret image clearly.
    Relation: International Journal of Information and Electronic Engineering 5(1), pp.15-20
    DOI: 10.7763/IJIEE.2015.V5.493
    Appears in Collections:[資訊管理學系暨研究所] 期刊論文

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