an OPTICAL PATTERN recognition system for validation &amp; security verification

Javidi, Bahram; Horner, Joseph L.; Walkup, John F.

doi:10.1364/opn.5.9.000013

Cited by 44 publications

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“…Optical technologies have recently been employed in data security [4][5][6][7]. Compared with traditional computer and electrical systems, optical technologies offer primarily two types of benefits.…”

Section: Introductionmentioning

confidence: 99%

“…In several pioneering studies [4][5][6], the authors demonstrated different optical verification systems for information security applications based on optical correlations. These systems correlate two functions: one, the lock, is always inside the correlator, and the other, the key, is presented to the system by the user in the verification stage.…”

Section: Introductionmentioning

confidence: 99%

“…Let us compare the existing and the proposed systems with a real example. In a secured plant, for instance, the existing verification systems [4][5][6] can let someone enter or block that person from entering. Our system can do the same, but in addition it can identify the authorized person that asks to enter and distinguish him from other authorized persons.…”

Section: Introductionmentioning

confidence: 99%

“…In Section 4.4, we survey a new development in our general paradigm called Concealogram. In this system, not only is the output a meaningful image but the input mask is as well [4].…”

Section: Introductionmentioning

confidence: 99%

“…(1) Optical systems have an inherent capability for parallel processing; that is, rapid transmission of information. (2) Information can be hidden in any of several dimensions, such as phase or spatial frequency; that is, optical systems have excellent capability for encoding information.In several pioneering studies [4][5][6], the authors demonstrated different optical verification systems for information security applications based on optical correlations. These systems correlate two functions: one, the lock, is always inside the correlator, and the other, the key, is presented to the system by the user in the verification stage.…”

mentioning

confidence: 99%

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Steganography and Encryption Systems Based on Spatial Correlators with Meaningful Output Images

Rosen

Javidi

2005

Optical and Digital Techniques for Information Security

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Summary. Three different optical security systems are surveyed in this chapter. Their common feature is the appearance of meaningful images on the system's output. In the first system, two phase-only transparencies are placed in a 4f correlator such that a known output image is received. In the second system, two phase-only transparencies are placed together in a joint-transform correlator for the same purposes. In both cases, the two phase masks are designed with an iterative optimization algorithm with constraints in the input and the output domains. In addition to simple verification, these security systems are capable of identifying the type of input mask according to the corresponding output image it generates. The third system is different from the two others in the sense that the system's input signal also is a meaningful image. This last system can offer various solutions for steganography, watermarking, and information coding. This chapter summarizes research first published in [1-3]. IntroductionOptical technologies have recently been employed in data security [4][5][6][7]. Compared with traditional computer and electrical systems, optical technologies offer primarily two types of benefits. (1) Optical systems have an inherent capability for parallel processing; that is, rapid transmission of information. (2) Information can be hidden in any of several dimensions, such as phase or spatial frequency; that is, optical systems have excellent capability for encoding information.In several pioneering studies [4][5][6], the authors demonstrated different optical verification systems for information security applications based on optical correlations. These systems correlate two functions: one, the lock, is always inside the correlator, and the other, the key, is presented to the system by the user in the verification stage. Mostly, the systems determine whether the input is true or false by detecting the correlation peak in the output plane. The next generation of these security systems should offer a higher level of security and more sophisticated services than the simple verification offered by

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…In Section 4.4, we survey a new development in our general paradigm called Concealogram. In this system, not only is the output a meaningful image but the input mask is as well [4].…”

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Steganography and Encryption Systems Based on Spatial Correlators with Meaningful Output Images

Rosen

Javidi

2005

Optical and Digital Techniques for Information Security

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Applications of Digital Holography for Information Security

Nomura

Tajahuerce

Matoba

et al. 2005

Optical and Digital Techniques for Information Security

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Summary. Secure optical storage based on a configuration of a joint transform correlator (JTC) using a photorefractive material is presented. A key code designed by an optimized algorithm so that its Fourier transform has a uniform amplitude distribution and a uniformly random phase distribution is introduced. Original twodimensional data and the key code are placed side-by-side at the input plane. Both of them are stored in a photorefractive material as a joint power spectrum. The retrieval of the original data can be achieved with the same key code. We can record multiple two-dimensional data in the same crystal by angular multiplexing and/or key-code multiplexing. IntroductionOptical information-processing techniques have proved to be a real alternative to purely electronic processing in security, encryption, and pattern-recognition applications [1][2][3][4][5][6][7][8][9][10][11][12][13]. This is partially due to recent advances in optoelectronic devices and components, such as detectors, modulators, optical memories, and displays. Now, in general, it is easy to transfer information from electronic to optical domains and vice versa at high speeds. In this way, it is possible to combine the advantages of both approaches to develop more efficient security applications. This fact is especially relevant when securing information codified in the form of two-dimensional (2-D) or three-dimensional (3-D) images because, in these cases, optical systems are unavoidable.One of the approaches to securing information by optical means consists in the use of random phase-encoding techniques [1][2][3]. In these methods, images or holograms are transformed, by using random phase masks, into noise distributions. Therefore, the original information remains encrypted and can be recovered only by means of a random phase mask acting as the key. However, in general, the resulting encrypted data contain both phase and amplitude and, thus, must be recorded and stored holographically [36]. This necessity makes it difficult to transmit the encrypted information over con-

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Optical detection of random features for high security applications

Haist

Tiziani

1998

Optics Communications

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Abstract-Optical detection of random features in combination with digital signatures based on public key codes in order to recognise counterfeit objects will be discussed. Without applying expensive production techniques objects are protected against counterfeiting. Verification is done offline by optical means without a central authority. The method is applied for protecting banknotes. Experimental results for this application are presented. The method is also applicable for identity verification of a credit-or chip-card holder.

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an OPTICAL PATTERN recognition system for validation & security verification

Cited by 44 publications

References 0 publications

Steganography and Encryption Systems Based on Spatial Correlators with Meaningful Output Images

Steganography and Encryption Systems Based on Spatial Correlators with Meaningful Output Images

Applications of Digital Holography for Information Security

Optical detection of random features for high security applications

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