Key-space analysis of double random phase encryption technique

Monaghan, David; Gopinathan, Unnikrishnan; Naughton, Thomas J.; Sheridan, John T.

doi:10.1364/ao.46.006641

Cited by 86 publications

(54 citation statements)

References 22 publications

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“…The random phase key located in the Fourier plane serves as the only key in this encryption scheme. The properties of this system and systems like it have been investigated extensively [71][72][73][74][75]. Various other linear optical systems have also been proposed in similar encryption architectures [76][77][78][79][80][81][82][83][84].…”

Section: Optical Image Encryptionmentioning

confidence: 99%

Phase in Optical Image Processing

Naughton¹,

Rastogi²,

Hack³

2010

AIP Conference Proceedings

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Abstract. The use of phase has a long standing history in optical image processing, with early milestones being in the field of pattern recognition, such as VanderLugt's practical construction technique for matched filters, and (implicitly) Goodman's joint Fourier transform correlator. In recent years, the flexibility afforded by phase-only spatial light modulators and digital holography, for example, has enabled many processing techniques based on the explicit encoding and decoding of phase. One application area concerns efficient numerical computations. Pushing phase measurement to its physical limits, designs employing the physical properties of phase have ranged from the sensible to the wonderful, in some cases making computationally easy problems easier to solve and in other cases addressing mathematics' most challenging computationally hard problems. Another application area is optical image encryption, in which, typically, a phase mask modulates the fractional Fourier transformed coefficients of a perturbed input image, and the phase of the inverse transform is then sensed as the encrypted image. The inherent linearity that makes the system so elegant mitigates against its use as an effective encryption technique, but we show how a combination of optical and digital techniques can restore confidence in that security. We conclude with the concept of digital hologram image processing, and applications of same that are uniquely suited to optical implementation, where the processing, recognition, or encryption step operates on full field information, such as that emanating from a coherently illuminated real-world three-dimensional object.

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Section: Optical Image Encryptionmentioning

confidence: 99%

Phase in Optical Image Processing

Naughton¹,

Rastogi²,

Hack³

2010

AIP Conference Proceedings

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“…Thus, encryption techniques have been widely studied [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18].In particular, optical encryption techniques with an advantage in terms of the encryption speed have been well researched [5][6][7][8][9][10][11][12][13][14][15][16]. Double random phase encryption (DRPE), which is the most widely used optical encryption technique, has been proposed [5].…”

Section: Introductionmentioning

confidence: 99%

Double Random Phase Encryption Based Orthogonal Encoding Technique for Color Images

Cho

2014

Journal of the Optical Society of Korea

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In this paper, we propose a simple Double random phase encryption (DRPE) -based orthogonal encoding technique for color image encryption. In the proposed orthogonal encoding technique, a color image is decomposed into red, green, and blue components before encryption, and the three components are independently encrypted with DRPE using the same key in order to decrease the complexity of encryption and decryption. Then, the encrypted data are encoded with a Hadamard matrix that has the orthogonal property. The purpose of the proposed orthogonal encoding technique is to improve the security of DRPE using the same key at the cost of a little complexity. The proposed orthogonal encoder consists of simple linear operations, so that it is easy to implement. We also provide the simulation results in order to show the effects of the proposed orthogonal encoding technique.

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“…In information communication technologies, encryption has been researched widely [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Optical encryption techniques [5][6][7][8][9][10][11][12][13][14][15][16] have higher encryption speed than non-optical encryption methods.…”

Section: Introductionmentioning

confidence: 99%

Optical Image Encryption and Decryption Considering Wireless Communication Channels

Cho¹

2014

Journal of Information Processing Systems

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Abstract-In this paper, we discuss optical encryption and decryption considering wireless communication channels. In wireless communication systems, the wireless channel causes noise and fading effects of the transmitted information. Optical encryption technique such as double-random-phase encryption (DRPE) is used for encrypting transmitted data. When the encrypted data is transmitted, the information may be lost or distorted because there are a lot of factors such as channel noise, propagation fading, etc. Thus, using digital modulation and maximum likelihood (ML) detection, the noise and fading effects are mitigated, and the encrypted data is estimated well at the receiver. To the best of our knowledge, this is the first report that considers the wireless channel characteristics of the optical encryption technique.

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Key-space analysis of double random phase encryption technique

Cited by 86 publications

References 22 publications

Phase in Optical Image Processing

Phase in Optical Image Processing

Double Random Phase Encryption Based Orthogonal Encoding Technique for Color Images

Optical Image Encryption and Decryption Considering Wireless Communication Channels

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