Fully phase encrypted image processor

Towghi, Nasser; Javidi, Bahram; Luo, Zheng

doi:10.1364/josaa.16.001915

Cited by 211 publications

(98 citation statements)

References 10 publications

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“…The methods have been proved to be useful by numerical simulations. Phase-coding techniques have widely been used due to the suitability for optical encoding and decoding with high degree of security (Neto & Sheng, 1996, Javidi & Ahouzi, 1998, Towghi et al, 1999, Tan et al, 2000, and Mogensen &Gluckstad, 2000. However, they have some difficulties due to the lack of efficient optical devices used in the systems.…”

Section: Methods Of Phase-codingmentioning

confidence: 99%

Optimization of Hologram for Security Applications

Ohtsubo¹

2011

Holograms - Recording Materials and Applications

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Section: Methods Of Phase-codingmentioning

confidence: 99%

Optimization of Hologram for Security Applications

Ohtsubo¹

2011

Holograms - Recording Materials and Applications

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“…The image decryption-decompression process is processed according to the equation (26). The computation in decryption-decompression consist inversion of the matrices and multiplication with reverse order of the 2D MPDFRFT so the complexity remains same during encryption-compression and decompressiondecryption process.…”

Section: Computation Complexitymentioning

confidence: 99%

Hybrid Encryption-Compression Scheme Based on Multiple Parameter Discrete Fractional Fourier Transform with Eigen Vector Decomposition Algorithm

Sharma¹,

Saxena²,

Singh³

2014

IJCNIS

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Abstract-Encryption along with compression is the process used to secure any multimedia content processing with minimum data storage and transmission. The transforms plays vital role for optimizing any encryptioncompression systems. Earlier the original information in the existing security system based on the fractional Fourier transform (FRFT) is protected by only a certain order of FRFT. In this article, a novel method for encryption-compression scheme based on multiple parameters of discrete fractional Fourier transform (DFRFT) with random phase matrices is proposed. The multiple-parameter discrete fractional Fourier transform (MPDFRFT) possesses all the desired properties of discrete fractional Fourier transform. The MPDFRFT converts to the DFRFT when all of its order parameters are the same. We exploit the properties of multipleparameter DFRFT and propose a novel encryptioncompression scheme using the double random phase in the MPDFRFT domain for encryption and compression data. The proposed scheme with MPDFRFT significantly enhances the data security along with image quality of decompressed image compared to DFRFT and FRFT and it shows consistent performance with different images. The numerical simulations demonstrate the validity and efficiency of this scheme based on Peak signal to noise ratio (PSNR), Compression ratio (CR) and the robustness of the schemes against bruit force attack is examined.

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“…In recent years there have been a number of proposed attacks [92][93][94][95][96][97] on DRPE-type encryption systems, including those systems that operate exclusively with phase [98,99]. Many of these attacks have shown that by only approximating the key one can get adequate decryption of encrypted images.…”

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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Fully phase encrypted image processor

Cited by 211 publications

References 10 publications

Optimization of Hologram for Security Applications

Optimization of Hologram for Security Applications

Hybrid Encryption-Compression Scheme Based on Multiple Parameter Discrete Fractional Fourier Transform with Eigen Vector Decomposition Algorithm

Phase in Optical Image Processing

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