(31) An Encryption Technique by Digital Holography
Nobukatsu Takai
北海学園大学大学院工学研究科紀要工学研究，第11号，pp.47-54，2011-09
A diffuse-type digital holography obeying to the theory of the optical holography is applied for encrypting a plaintext. The technique is based on a fact that the error of the image reconstructed from the 8-bit digital hologram is smaller than the level of 0-bit plane in a sense of statistics. An algorithm by which the reconstruction error of digital holography can be removed in a complete form still without a single bit error is proposed. An idea of the key for protecting the plaintext recovered from the digital hologram is also presented.
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