2015 Fiscal Year Final Research Report
Developement research into the visual secret sharing (visual cryptography) that uses laser speckles
| Project/Area Number |
26540054
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Information security
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| Research Institution | Ibaraki University |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Keywords | 視覚復号型秘密分散法 / 視覚復号型暗号法 / スペックル / ランダムグリッド |
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| Outline of Final Research Achievements |
We used for the first time the speckle pattern created by the scattered laser beam from rough surfaces in order to perform the visual secret sharing that is cryptography method of hiding a secret image by stacking two meaningless random pattern, which is alternative material for random grid pattern. Segmentation and binarization of the speckle pattern was performed for making one share embedding secret image. Reconstruction of the secret image was successfully achieved by the product between the share and the original speckle pattern. This means that it is able to decode the secret image by irradiating directly the speckle pattern into the share.
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| Free Research Field |
光情報処理
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