(23) ディジタルホログラフィ暗号技術のホログラムキー
北海学園大学工学部研究報告 第32号, pp.147-158, 2005-2
In a digital holographic cryptography, the encrypted data of a plaintext are recorded on a diffuse-type digital hologram in a randomly distributed fashion. In this report, a hologram key which locks the hologram in a way that the plaintext can never be decoded by a man not having it is investigated in some details. The condition for hologram keys is given and several kinds of hologram keys are presented. The strength of hologram keys in the cryptographic system is shown by evaluating the extent of their keyspace. As a result, the double locking system is recommended as a robust hologram key.
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