Dual Optical Encryption for Binary Data and Secret Key Using Phase-shifting Digital Holography

Jeon, Seok Hee; Gil, Sang Keun

doi:10.3807/josk.2012.16.3.263

Cited by 7 publications

(3 citation statements)

References 23 publications

(25 reference statements)

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“…이와 같은 문제를 해결하기 위해 1990년대 초부터 여러 가지 방식의 광학적 기술을 적 용한 암호화 기법이 지속적으로 연구되어 왔다. 대표적인 광 암호화 기법으로는 Javidi그룹이 수행한 이중 무작위 위상 인코딩(double random phase encoding) 기법을 이용한 방법 [5,6] 이 있으며, 이 밖에도 결합 변환 상관기(JTC)를 이용한 방 법 [7,8] , 위상 대비를 이용한 방법 [9] , 분수차 푸리에 변환을 이 용한 방법 [10] , 디지털 위상 천이 간섭계를 이용한 방법 [11][12][13] 등 그 외에 다양한 암호화 기법들 [14][15][16][17][18][19][20] 이 연구되어 발표되었 다. 하지만 이러한 방법들 중 대부분은 주파수 영역의 복소 함수를 다룸으로써 광학 시스템의 광축 정렬 문제나 외부 교 란에 의한 민감한 단점을 지니고 있다.…”

Section: 키는 방법의 일환으로 Des(data Encryption Standard) Aesunclassified

Optical CBC Block Encryption Method using Free Space Parallel Processing of XOR Operations

Gil

2013

Korean Journal of Optics and Photonics

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In this paper, we propose a modified optical CBC(Cipher Block Chaining) encryption method using optical XOR logic operations. The proposed method is optically implemented by using dual encoding and a free-space interconnected optical logic gate technique in order to process XOR operations in parallel. Also, we suggest a CBC encryption/decryption optical module which can be fabricated with simple optical architecture. The proposed method makes it possible to encrypt and decrypt vast two-dimensional data very quickly due to the fast optical parallel processing property, and provides more security strength than the conventional electronic CBC algorithm because of the longer security key with the two-dimensional array. Computer simulations show that the proposed method is very effective in CBC encryption processing and can be applied to even ECB(Electronic Code Book) mode and CFB(Cipher Feedback Block) mode.

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Section: 키는 방법의 일환으로 Des(data Encryption Standard) Aesunclassified

Optical CBC Block Encryption Method using Free Space Parallel Processing of XOR Operations

Gil

2013

Korean Journal of Optics and Photonics

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“…In recent years, there has been increasing interest in the use of optical encryption methods for security systems [3][4][5][6][7][8][9][10][11][12][13][14]. In addition, we have presented several papers on the optical encryption techniques by using phase-shifting digital holography [15][16][17][18][19]. Optoelectronic methods using digital logic may be adequate for encryption.…”

Section: Introductionmentioning

confidence: 99%

Optical Secret Key Sharing Method Based on Diffie-Hellman Key Exchange Algorithm

Jeon

Gil

2014

Journal of the Optical Society of Korea

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In this paper, we propose a new optical secret key sharing method based on the Diffie-Hellman key exchange protocol required in cipher system. The proposed method is optically implemented by using a free-space interconnected optical logic gate technique in order to process XOR logic operations in parallel. Also, we present a compact type of optical module which can perform the modified Diffie-Hellman key exchange for a cryptographic system. Schematically, the proposed optical configuration has an advantage of producing an open public key and a shared secret key simultaneously. Another advantage is that our proposed key exchange system uses a similarity to double key encryption techniques to enhance security strength. This can provide a higher security cryptosystem than the conventional Diffie-Hellman key exchange protocol due to the complexity of the shared secret key. Results of numerical simulation are presented to verify the proposed method and show the effectiveness in the modified Diffie-Hellman key exchange system.

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“…This requirement makes it difficult to store and transmit the cipher data over digital communication networks. In order to solve this problem, optical encryption and decryption to record and reconstruct the complex values has been performed using a phase-shifting digital holographic technique [13][14][15][16][17][18][19]. Optoelectronic methods using digital logics are adequate for encryption.…”

Section: Introductionmentioning

confidence: 99%

Optical Implementation of Triple DES Algorithm Based on Dual XOR Logic Operations

Jeon¹,

Gil²

2013

Journal of the Optical Society of Korea

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In this paper, we propose a novel optical implementation of a 3DES algorithm based on dual XOR logic operations for a cryptographic system. In the schematic architecture, the optical 3DES system consists of dual XOR logic operations, where XOR logic operation is implemented by using a free-space interconnected optical logic gate method. The main point in the proposed 3DES method is to make a higher secure cryptosystem, which is acquired by encrypting an individual private key separately, and this encrypted private key is used to decrypt the plain text from the cipher text. Schematically, the proposed optical configuration of this cryptosystem can be used for the decryption process as well. The major advantage of this optical method is that vast 2-D data can be processed in parallel very quickly regardless of data size. The proposed scheme can be applied to watermark authentication and can also be applied to the OTP encryption if every different private key is created and used for encryption only once. When a security key has data of 512×256 pixels in size, our proposed method performs 2,048 DES blocks or 1,024 3DES blocks cipher in this paper. Besides, because the key length is equal to 512×256 bits, 2 512×256 attempts are required to find the correct key. Numerical simulations show the results to be carried out encryption and decryption successfully with the proposed 3DES algorithm.

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Dual Optical Encryption for Binary Data and Secret Key Using Phase-shifting Digital Holography

Cited by 7 publications

References 23 publications

Optical CBC Block Encryption Method using Free Space Parallel Processing of XOR Operations

Optical CBC Block Encryption Method using Free Space Parallel Processing of XOR Operations

Optical Secret Key Sharing Method Based on Diffie-Hellman Key Exchange Algorithm

Optical Implementation of Triple DES Algorithm Based on Dual XOR Logic Operations

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