Optical image encryption via ptychography

Shi, Yishi; Li, Tuo; Wang, Yali; Gao, Qiankun; Zhang, Sanguo; Hai-fei, LI

doi:10.1364/ol.38.001425

Cited by 196 publications

(58 citation statements)

References 11 publications

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“…Optical encryption techniques have attracted significant interest because optical systems can offer the possibility of high speed processing and provide many degrees of freedom to handle optical parameters such as amplitude, phase, wavelength and polarization (1)(2)(3)(4)(5). A popular optical encryption technique is based on double-random-phase encoding in a well-known 4-f coherent system (6), and many other optical encryption techniques, such as the use of fractional Fourier transform (7,8), Fresnel transform (9,10), gyrator transform (11,12), polarization (13) and diffractive imaging (14), have been investigated.…”

Section: Introductionmentioning

confidence: 99%

Optical image encryption using optical scanning and fingerprint keys

Yan

Poon

et al. 2016

Journal of Modern Optics

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Fingerprint authentication is a preferable biometric technique for securing images. Optical scanning cryptography (OSC) is a hybrid optical/digital method to encrypt and decrypt an image using optical scanning technique. In this paper, we propose a new strategy to combine OSC with fingerprints to enhance security. We have verified the effectiveness of the proposed idea in simulations. Subsequently practical implementation of the idea has also been performed with optical heterodyning to confirm the results from simulations. We have also discussed the added security and flexibility of implementation when optical heterodyning is employed in cryptography. KEYWORDSimage and image processing; optical security and encryption; digital holography; fingerprint keys; optical scanning; biometric security ARTICLE HISTORY

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Section: Introductionmentioning

confidence: 99%

Optical image encryption using optical scanning and fingerprint keys

Yan

Poon

et al. 2016

Journal of Modern Optics

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“…The main motivation for using optics for information security is that optical waveforms possess many complex degrees of freedom such as amplitude, phase, polarization, large bandwidth, nonlinear transformations, quantum properties of photons, and multiplexing that can be combined in many ways to make information encryption more secure and more difficult to attack. Several methods for optical image encryption have been proposed such as those based on digital holography [11,12], virtual optics [13], diffractive imaging [14], ghost imaging [15], ptychography [16], interferometry [17], polarization [18,19], photon-counting [20], etc. In 1995, Refrégier and Javidi [21], proposed the 'double random phase encoding' (DRPE) scheme.…”

Section: Introductionmentioning

confidence: 99%

Optical triple random-phase encryption

et al. 2017

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Abstract. We propose an optical security technique for image encryption using triple random phase encoding (TRPE). In the encryption process, the original image is first double random phase encrypted. The obtained function is then multiplied by a third random phase key in the output plane, to enhance the security level of the encryption process. This method reduces the vulnerability to certain attacks observed when using the conventional double random phase encoding (DRPE). To provide the security enhancement of the proposed TRPE method, three attack cases are discussed: Chosen-plaintext attacks (CPA), Known-plaintext attacks (KPA) and chosen-ciphertext attacks (CCA). Numerical results are presented to demonstrate feasibility and effectiveness of the proposed method. Compared with conventional DRPE, the proposed encryption method can provide an effective alternative and has enhanced security features against the above-mentioned attacks.

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“…Especially since the double random-phase encryption method [1] was proposed, all kinds of random-phase encoding (RPE) schemes based on diffraction or interference principles have been booming [2][3][4][5][6][7][8][9][10][11][12][13]. As the accompanying complementary opposites, the corresponding security analyses have also been carried out and have promoted the further development of optical encryption techniques [14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Optical Encryption Scheme with Multiple Users Based on Computational Ghost Imaging and Orthogonal Modulation

Yuan

Liu

Zhou

et al. 2016

Journal of the Optical Society of Korea

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For the application of multiusers, the arrangement and distribution of the keys is a much concerning problem in a cryptosystem. In this paper, we propose an optical encryption scheme with multiple users based on computational ghost imaging (CGI) and orthogonal modulation. The CGI encrypts the secret image into an intensity vector rather than a complex-valued matrix. This will bring convenience for post-processing and transmission of the ciphertext. The orthogonal vectors are taken as the address codes to distinguish users and avoid cross-talk. Only the decryption key and the address code owned by an authorized user are matched, the secret image belonging to him/her could be extracted from the ciphertext. Therefore, there are two security levels in the encryption scheme. The feasibility and property are verified by numerical simulations.

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Optical image encryption via ptychography

Cited by 196 publications

References 11 publications

Optical image encryption using optical scanning and fingerprint keys

Optical image encryption using optical scanning and fingerprint keys

Optical triple random-phase encryption

Optical Encryption Scheme with Multiple Users Based on Computational Ghost Imaging and Orthogonal Modulation

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