Binary image encryption based on interference of two phase-only masks

Jia, Wei; Wen, Fung Jacky; Chow, Y. T.; Zhou, Changhe

doi:10.1364/ao.51.005253

Cited by 16 publications

(7 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently, an extremely simple method for binary image encryption based on interference of two POMs is proposed without any silhouette problem. The binary image in combination with a random phase mask is separated into two POMs directly, and the decryption by summation of the two masks can be performed digitally or optically [34].…”

Section: Introductionmentioning

confidence: 99%

Security enhancement of color image cryptosystem by optical interference principle and spiral phase encoding

Abuturab

2013

Appl. Opt.

View full text Add to dashboard Cite

A color information cryptosystem based on optical interference principle and spiral phase encoding is proposed. A spiral phase mask (SPM) is used instead of a conventional random phase mask because it contains multiple storing keys in a single phase mask. The color image is decomposed into RGB channels. The decomposed three RGB channels can avoid the interference of crosstalks efficiently. Each channel is encoded into an SPM and analytically generates two spiral phase-only masks (SPOMs). The two SPOMs are then phase-truncated to get two encrypted images and amplitude-truncated to produce two asymmetric phase keys. The two SPOMs and the two asymmetric phase keys can be allocated to four different authorized users. The order, the wavelength, the focal length, and the radius are construction parameters of the SPM (or third SPOM) that can also be assigned to the four other different authorized users. The proposed technique can be used for a highly secure verification system, so an unauthorized user cannot retrieve the original image if only one key out of eight keys is missing. The proposed method does not require iterative encoding or postprocessing of SPOMs to overcome inherent silhouette problems, and its optical setup alleviates stringent alignment of SOPMs. The validity and feasibility of the proposed method are supported by numerical simulation results.

show abstract

Section: Introductionmentioning

confidence: 99%

Security enhancement of color image cryptosystem by optical interference principle and spiral phase encoding

Abuturab

2013

Appl. Opt.

View full text Add to dashboard Cite

show abstract

“…With these methods, images can be encoded into several phase-only masks (POMs), the main underlying motivations stemming from the attempts to avoid the complexity of an all-optical implementation and improve security. Compared with those encryption methods based on iterative phase retrieval algorithms, the interference-based imagehiding method is simpler and its computing weight is much lighter [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]. Zhang and Wang first encrypted an original image into two POMs analytically based on the optical interference principle for the first time [15].…”

Section: Introductionmentioning

confidence: 99%

Optical image-hiding method with false information disclosure based on the interference principle and partial-phase-truncation in the fractional Fourier domain

Dai¹,

Wang²,

Zhou³

et al. 2014

Laser Phys. Lett.

View full text Add to dashboard Cite

An image-hiding method based on the optical interference principle and partial-phasetruncation in the fractional Fourier domain is proposed. The primary image is converted into three phase-only masks (POMs) using an analytical algorithm involved partial-phase-truncation and a fast random pixel exchange process. A procedure of a fake silhouette for a decryption key is suggested to reinforce the encryption and give a hint of the position of the key. The fractional orders of FrFT effectively enhance the security of the system. In the decryption process, the POM with false information and the other two POMs are, respectively, placed in the input and fractional Fourier planes to recover the primary image. There are no unintended information disclosures and iterative computations involved in the proposed method. Simulation results are presented to verify the validity of the proposed approach.

show abstract

“…The silhouette problem arises because of the tight constraint between the two phase masks and the complex field of the Fresnel-transformed image. Several security-enhancement or silhouetteremoval methods have been developed [28][29][30][31][32][33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

“…In the earlier interference-based encryption methods [28][29][30][31][32][33][34], the information of the Fourier spectrum of the target image is divided into two POMs. The corresponding effects of the two parts on the silhouette problem are compared.…”

Section: Introductionmentioning

confidence: 99%

Information authentication system using interference of two beams in gyrator transform domain

Abuturab¹

2013

Appl. Opt.

View full text Add to dashboard Cite

A novel information authentication system, i.e., an asymmetric optical interference of two beams in the gyrator transform (GT) domain, is proposed. In this algorithm, the input color image is divided into R, G, and B channels. The complex field of each channel is constructed by the inverse Fourier transform of the channel attached with a random phase function. The phase-only mask (POM) and amplitude-only mask (AOM) are analytically derived from the complex field. The POM and AOM are separately gyrator transformed. The two asymmetric phase keys and two encrypted images are obtained by the amplitude truncations and phase truncations of the transform images, respectively. Finally, the encoded image is produced by the interference of two encrypted images. The two asymmetric keys and two angle parameters of the GT are regarded as additional keys for each channel to enhance the security level of the cryptosystem. The noniterative authentication procedure is devoid of any silhouette problem. The proposed system can be implemented digitally or optically, and its architecture is free from optical misalignment problems. The theoretical analysis and numerical simulation results both validate the proposed technique.

show abstract

Binary image encryption based on interference of two phase-only masks

Cited by 16 publications

References 23 publications

Security enhancement of color image cryptosystem by optical interference principle and spiral phase encoding

Security enhancement of color image cryptosystem by optical interference principle and spiral phase encoding

Optical image-hiding method with false information disclosure based on the interference principle and partial-phase-truncation in the fractional Fourier domain

Information authentication system using interference of two beams in gyrator transform domain

Contact Info

Product

Resources

About