Optical implementation of cipher block chaining mode algorithm using phase-shifting digital holography

Seok-Hee Jeon; Sang-Keun Gil

doi:10.1117/1.OE.55.12.123112

23 December 2016 Optical implementation of cipher block chaining mode algorithm using phase-shifting digital holography

Seok-Hee Jeon, Sang-Keun Gil

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Optical Engineering, Vol. 55, Issue 12, 123112 (December 2016). https://doi.org/10.1117/1.OE.55.12.123112

Abstract

We propose an optical design of cipher block chaining (CBC) encryption mode using digital holography, which is implemented by the two-step quadrature phase-shifting digital holographic encryption technique using orthogonal polarization. A block of plain text is encrypted with the encryption key by applying the two-step phase-shifting digital holographic method; then, it is changed into cipher text blocks which are digital holograms. Optically, these digital holograms with the encrypted information are Fourier transform holograms and are recorded onto charge-coupled devices with 256 quantization gray levels. This means that the proposed optical CBC encryption is a scheme that has an analog-type of pseudorandom pattern information in the cipher text, while the conventional electronic CBC encryption is a kind of bitwise block message encryption processed by digital bits. Also, the proposed method enables the cryptosystem to have higher security strength and faster processing than the conventional electronic method because of the large two-dimensional (2-D) array key space and parallel processing. The results of computer simulations verify that the proposed optical CBC encryption design is very effective in CBC mode due to fast and secure optical encryption of 2-D data and shows the feasibility for the CBC encryption mode.

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Seok-Hee Jeon and Sang-Keun Gil "Optical implementation of cipher block chaining mode algorithm using phase-shifting digital holography," Optical Engineering 55(12), 123112 (23 December 2016). https://doi.org/10.1117/1.OE.55.12.123112

Received: 26 July 2016; Accepted: 5 December 2016; Published: 23 December 2016

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KEYWORDS

Digital holography

Image encryption

Binary data

Holograms

Phase shifts

3D image reconstruction

Holography

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