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Proceedings Paper

Asymmetric public key cryptosystem using digital holographic encryption method
Author(s): Sang Keun Gil; Seok Hee Jeon; Jong Rae Jeong; Nam Kim
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Paper Abstract

A novel asymmetric public key cryptographic algorithm is proposed by modifying the conventional RSA public key protocol, which can be optically implemented by using the phase-shifting digital holography. The proposed method involves a two-key encryption scheme so that it provides stronger security than the one-key encryption method. Optically, two unknown randomly generated numbers are changed to digital holograms which are used as public keys for asymmetric cryptography. The generated public keys and cipher texts by using them are Fourier transformed digital holograms with 256 gray level quantized intensities which are recorded on CCDs. The original plain text can be decrypted only with correct pairs of public-private keys and the holographic encryption-decryption keys in the proposed algorithm. The proposed optical schematic has an advantage of producing an enhanced asymmetric public key cryptosystem compared to the conventional RSA cryptosystem. The results of computer simulations verify that the proposed method shows the feasibility of application to an asymmetric public key cryptosystem with high security strength.

Paper Details

Date Published: 21 February 2020
PDF: 8 pages
Proc. SPIE 11306, Practical Holography XXXIV: Displays, Materials, and Applications, 113060V (21 February 2020); doi: 10.1117/12.2548289
Show Author Affiliations
Sang Keun Gil, The Univ. of Suwon (Korea, Republic of)
Seok Hee Jeon, Incheon National Univ. (Korea, Republic of)
Jong Rae Jeong, Suwon Science College (Korea, Republic of)
Nam Kim, Chungbuk National Univ. (Korea, Republic of)

Published in SPIE Proceedings Vol. 11306:
Practical Holography XXXIV: Displays, Materials, and Applications
Hans I. Bjelkhagen, Editor(s)

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