- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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Scaling effects on the optical properties of patterned nano-layered shape memory films
摘要： Nano-layered films of PVAc/PU systems were fabricated by forced assembly coextrusion method. The bulk shape memory properties of PVAc/PU systems were utilized to program nanoscale patterns such as diffraction grating which exhibit iridescence after patterning. A hot embossing process has been utilized to imprint diffraction grating patterns as nano-scale information onto the surface of the thin multilayer films. Three levels of hierarchy i.e. layer thickness, spacing and heights of patterns, governs the functionality of the patterned multilayer film. The time and temperature dependent viscoelastic shape memory behavior determines the opto-mechanical tunability of the film. Mechanical switching of the patterns also leads to optical switching of the films which corresponds to their efficiency of information retrieval. The recovery of patterns as well as the diffractive property depends on the layer thickness (l) of films and heights of patterns (h0). The results illustrate that the higher ratio of h0/l better is the recovery of the grating patterns and the corresponding diffractive properties. This scaling effect enables versatile applications in information security by tuning the layer structure of the multilayer shape memory films.
关键词： scaling effect,shape memory film,pattern programming,hot embossing,multilayer film,information security,diffractive optical element,thermal responsive optics
更新于2025-10-22 19:40:53
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Double Quantum Image Encryption Based on Arnold Transform and Qubit Random Rotation
摘要： Quantum image encryption offers major advantages over its classical counterpart in terms of key space, computational complexity, and so on. A novel double quantum image encryption approach based on quantum Arnold transform (QAT) and qubit random rotation is proposed in this paper, in which QAT is used to scramble pixel positions and the gray information is changed by utilizing random qubit rotation. Actually, the independent random qubit rotation operates once, respectively, in spatial and frequency domains with the help of quantum Fourier transform (QFT). The encryption process accomplishes pixel confusion and diffusion, and finally the noise-like cipher image is obtained. Numerical simulation and theoretical analysis verify that the method is valid and it shows superior performance in security and computational complexity.
关键词： quantum image representation,quantum Fourier transform,quantum image encryption,Arnold transform,information security
更新于2025-09-23 15:22:29
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[IEEE 2019 34th Symposium on Microelectronics Technology and Devices (SBMicro) - Sao Paulo, Brazil (2019.8.26-2019.8.30)] 2019 34th Symposium on Microelectronics Technology and Devices (SBMicro) - Analysis and measurement of the non-linear refractive index of SiO <sub/>x</sub> N <sub/>y</sub> using pedestal waveguides
摘要： Incidents involving data breaches are ever-present in the media since several years. In order to overcome this threat, organizations apply enterprise content-aware data leakage prevention (DLP) solutions to monitor and control data access and usage. However, this paper argues that current solutions are not able to reliably protect information assets. The analyses of data breaches reported in 2014 reveal a significant number of data leakage incidents that are not within the focus of the DLP solutions. Furthermore, these analyses indicate that the classification of the provided data breach records is not qualified for detailed investigations. Therefore, advanced criteria for characterizing data leakage incidents are introduced, and the reported records are extended. The resulting analyses illustrate that DLP and information leakage prevention (ILP) demand various information security (IS) measures to be established in order to reduce the risk of technologically based data breaches. Furthermore, the effectiveness of DLP and information leakage prevention (ILP) measures is significantly influenced by non-technological aspects, such as the human factor. Therefore, this paper presents a concept for establishing DLP and ILP within the scope of IS.
关键词： information leakage prevention,information exposure,data security,Security,data leakage prevention,information security
更新于2025-09-19 17:13:59
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Fast and precise global maximum power point tracking techniques for photovoltaic system
摘要： Incidents involving data breaches are ever-present in the media since several years. In order to overcome this threat, organizations apply enterprise content-aware data leakage prevention (DLP) solutions to monitor and control data access and usage. However, this paper argues that current solutions are not able to reliably protect information assets. The analyses of data breaches reported in 2014 reveal a significant number of data leakage incidents that are not within the focus of the DLP solutions. Furthermore, these analyses indicate that the classification of the provided data breach records is not qualified for detailed investigations. Therefore, advanced criteria for characterizing data leakage incidents are introduced, and the reported records are extended. The resulting analyses illustrate that DLP and information leakage prevention (ILP) demand various information security (IS) measures to be established in order to reduce the risk of technologically based data breaches. Furthermore, the effectiveness of DLP and information leakage prevention (ILP) measures is significantly influenced by non-technological aspects, such as the human factor. Therefore, this paper presents a concept for establishing DLP and ILP within the scope of IS.
关键词： information leakage prevention,information exposure,data security,Security,data leakage prevention,information security
更新于2025-09-19 17:13:59
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[IEEE 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Chicago, IL, USA (2019.6.16-2019.6.21)] 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Towards High-Efficiency Triple-Junction Bifacial III-V Nanowire-on-Silicon Solar Cells: Design Approaches Enabling the Concept
摘要： Incidents involving data breaches are ever-present in the media since several years. In order to overcome this threat, organizations apply enterprise content-aware data leakage prevention (DLP) solutions to monitor and control data access and usage. However, this paper argues that current solutions are not able to reliably protect information assets. The analyses of data breaches reported in 2014 reveal a significant number of data leakage incidents that are not within the focus of the DLP solutions. Furthermore, these analyses indicate that the classification of the provided data breach records is not qualified for detailed investigations. Therefore, advanced criteria for characterizing data leakage incidents are introduced, and the reported records are extended. The resulting analyses illustrate that DLP and information leakage prevention (ILP) demand various information security (IS) measures to be established in order to reduce the risk of technologically based data breaches. Furthermore, the effectiveness of DLP and information leakage prevention (ILP) measures is significantly influenced by non-technological aspects, such as the human factor. Therefore, this paper presents a concept for establishing DLP and ILP within the scope of IS.
关键词： information leakage prevention,information exposure,data security,Security,data leakage prevention,information security
更新于2025-09-19 17:13:59
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Purcell-Enhanced Spontaneous Emission from Perovskite Quantum Dots Coupled to Plasmonic Crystal
摘要： Lead halide perovskite quantum dots (PQDs) have recently been proposed as scalable and color-tunable single emitters, but their slow spontaneous emission (1-10 ns) creates a mismatch with high-speed nanophotonic devices. Here we demonstrate Purcell enhanced emission rate in hybrid structure of PQDs coupled to plasmonic crystal at room temperature. A series of planar devices are produced in large scale via chemistry assembly using colloidal PQDs, Ag nanocubes and polyvinyl pyrrolidone (PVP) as building blocks. By varying the PVP spacer thickness as well as Ag nanocube surface density, a tunable photoluminescence enhancement is realized in both steady and time resolved measurements. We show a 3.5-fold enhancement in the total fluorescence intensity and simultaneously an increase in the emission rate of a factor of 4.5. Finally, a proof-of-concept tag using PVP spacer encoded inks is demonstrated, providing a promising approach for information security based on Purcell-enhanced emission.
关键词： perovskite quantum dots,plasmonic crystal,information security,spontaneous emission,Purcell-enhanced emission
更新于2025-09-16 10:30:52
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Two-party quantum private comparison protocol with maximally entangled seven-qubit state
摘要： Quantum private comparison (QPC), whose security is based on some laws of quantum mechanics (e.g. quantum noncloning theorem and Heisenbergs uncertainty principle), allows n(n ≥ 2) parties who do not trust each other to judge whether their secret data are the same while maintaining data privacy. In this paper, we investigate the utility of the maximally entangled seven-qubit state for QPC, and we propose a new protocol which enables two parties to compare their secret data with each other for equality without disclosing their secret data. In our protocol, single particle measurements and Bell-basis measurements are employed, both of which can be implemented with current technologies. In addition to quantum measurements, our protocol does not use other quantum technologies such as entanglement swapping and unitary operations. A semi-honest third-party who assists two parties in implementing the protocol is assumed in our protocol. Furthermore, we use the entanglement correlations of the maximally entangled seven-qubit state and collaborative computing between parties for privacy protection, and we use quantum key distribution (QKD) to ensure the security of the cooperative computing when two parties are in di?erent locations. What is more, we show that the security towards both outsider and insider attacks can be guaranteed.
关键词： quantum private comparison,quantum cryptography,Information security,maximally entangled seven-qubit state,secure multi-party quantum computation
更新于2025-09-12 10:27:22
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PbS Quantum Dots Based on Physically Unclonable Function for Ultra High-Density Key Generation
摘要： Secure data encryption depends on the one-way functions and copy protection relies on features that are hard to reproduce. Herein, we present the physically unclonable function (PUF) concept based on PbS quantum dots (QDS) for ultra high-density key generation. Compared with existing PUFs, the proposed QDs-based PUF may boost the key density by about an order of magnitude, and also has certain advantages in terms of uniqueness, randomness and spatial characteristics. The proposed PUF passes applicable National Institute of Standards and Technology randomness tests. The area/bit is 14.5 nm2 for PbS QDs-based PUF1, 54.76 nm2 for PbS QDs-based PUF2, respectively. Compared with optical PUF, it improves the key density about 9.6 times and 2.3 times, respectively. Further, PbS QDs-based PUF1 and PbS QDs-based PUF2 demonstrate the larger data spaces and the read data has better spatial characteristics and uniqueness. We anticipate the QDs-based PUF circuit would shed light on future research of circuit design and information security technology.
关键词： key density,information security,physically unclonable functions,Quantum dots
更新于2025-09-12 10:27:22
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A Secret Information Preservation Scheme Based on Four-qubit Entangled State
摘要： With the improvement of people’s security awareness, the security of personal information has attracted more and more attention. This paper proposes a scheme that considers the preservation of personal information fundamentally. It is based on quantum cryptography. The scheme uses four-qubit entangled states and unitary operation to preserve or read information. In addition, quantum key distribution and one-time pad are used to ensure the security of message transmission. Finally, security analysis shows that the scheme is feasible.
关键词： Four-qubit entangled state,Information security,Quantum measurement,Unitary operation
更新于2025-09-11 14:15:04
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Design of dividing reconfigurable phase mask by random size for optical security system
摘要： In this paper, we propose an algorithm for designing structured phase mask in random sized segmentation, which is the security key in optical cryptosystem. A scheme for the generation, store and encoding this mask is demonstrated. We present the numerical simulation results of the proposed phase masks employed in the double random phase encoding system. To show the improvements of this structured phase mask (SPM) over the random phase mask (RPM), the encryption and decryption behaviors of the SPM and RPM are compared. The structural parameters sensitivity simulations of the key were also performed.
关键词： Random phase mask,Optical encryption,4f correlator,Information security
更新于2025-09-11 14:15:04