Developement research into the visual secret sharing (visual cryptography) that uses laser speckles

Research Project

Project/Area Number	26540054
Research Category	Grant-in-Aid for Challenging Exploratory Research
Allocation Type	Multi-year Fund
Research Field	Information security
Research Institution	Ibaraki University
Principal Investigator	Uno Katsuhiro 茨城大学, 工学部, 准教授 (10280710)
Project Period (FY)	2014-04-01 – 2016-03-31
Project Status	Completed (Fiscal Year 2015)
Budget Amount *help	¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000) Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000) Fiscal Year 2014: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
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 / 視覚復号型暗号 / スペックルパターン / 秘密分散
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.

Report

(3 results)