Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 18 of 18 for “"Anti-Counterfeiting"”.
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Optimization of Physical Unclonable Function Protocols for Lightweight Processing
… primitives for device identification and anti-counterfeiting. However, PUFs are associated with noise and bias which in turn affects its property of reliability and predictability. The noise is corrected using fuzzy extractors, but the helper data generated during the process may cause …
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Microfluidic processes to create structured microparticle arrangements and their applications
… applications: thermally stable particles for anti-counterfeiting application; and porous hydrogels for multiplexed microRNA detection. Third, we develop a microfluidic platform, porous microwell arrays, to manipulate microparticles while fulfilling all four desired capabilities (i.e. …
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Entropy Estimation for Arbiter PUF and Applications to Authenticated Key Exchange
… for device authentication, key generation, and anti-counterfeiting. Modeling and estimating the entropy of PUF responses to random challenges is the first step in formalizing the security of PUF-based cryptographic protocols. In this thesis, we consider the Arbiter PUF (APUF), a widely used and …
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A Statistical and Circuit Based Technique for Counterfeit Detection in Existing ICs
… failure of systems and platforms. To prevent counterfeiting and the associated revenue loss, there is need for non-invasive and inexpensive techniques to establish the authenticity of devices. We describe a technique to detect a counterfeit IC that does not have any special anti-counterfeiting …
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Nanofabrication towards biophotonics
… into a benchtop system for use as sensors or anti-counterfeit labels. Chapter 1 gives an introduction to plasmonics and more specifically nanohole arrays and how they have potential as label free sensors compared to the current biosensors on the market. Various fabrication methods are …
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Energy-Efficient Security Solutions for Next-Generation Embedded Systems
… neural engine. Finally, this work delves into anti-counterfeiting in agriculture and develops an interdisciplinary solution that combines materials engineering and computer science. The solution involves the use of silk tags attached to individual seeds, assigning them unique identities using …
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Leveraging features of nanoscale particulates for information encoding, quantitative sensing and drug delivery
… information within microparticles, (ii) rapid, quantitative sensing of hydrophobic colloids and (iii) immunologically-focused drug delivery. Specifically, upconversion nanocrystals are used as the foundation of a novel spatial-spectral patterning motif to produce polymer microparticles with …
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Exploring the Factors that Impact on the Attitude to Purchase: A spotlight on counterfeit luxury handbags among Durban's emergent Black Middle-class Females
… of research strategy, the study made use of a quantitative approach. The target population regarding the investigation pertained to Durban's emergent Black middle-class females. In order to segment this population, nonprobability sampling was utilised, with convenience and snowball sampling …
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Three Essays on Irregular Entries to the End-Customer Market
… the irregularities of supplier encroachment and counterfeiting problems. This dissertation addresses these issues and proposes solutions in the form of three essays. In the first essay, I study a supply chain, consisting of a supplier and a buyer where the supplier can encroach on the …
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Coinage Crimes and Society in England During the Period of the British Republic, 1649-1660
… coinage crimes, which includes acts such as the counterfeiting and clipping of official coins, and the uttering of these, and the authorities’ reaction to them, within England during the British Republic (1649-1660). In the first chapter, it will also analyse the background to the Commonwealth’s …
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The Effects of Quantum Dot Nanoparticles on Polyjet Direct 3D Printing Process
… can be embedded into AM builds and serve as an anti-counterfeiting measure. The nanoparticle selected for this work is a Quantum Dot (QD), which absorbs UV light and emits light in the visible spectrum. This unique interaction with light makes the QDs ideal for a security system since the …
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Binder-Powder Interaction: Investigating the Process-Property Relations in Metal Binder Jetting
… on densification are leveraged to create an anti-counterfeiting tagging strategy by controlling the pores and grain microstructures inside a part. In this novel approach, binder concentration is controlled in a manner that the stochastically formed pores are clustered to create a designed …
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Nanophosphor-based Photonics
… sens-ing, bioimaging, theranostics, anti-counterfeiting, and any application that requires precise control over the chromatic content of the emission and the manner in which it is extracted from the system to maximize its potential. This increase in applica-tions comes with higher …
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Cs-Pb-Br Core-shell Perovskite Microcrystals for Stability Improvement
… of the composite material in the field of anti-counterfeiting was studied. This paper describes the synthesis and characterisation of two core-shell structures based on CsPbBr3 NCs, with a particular focus on enhancing their stability and physical properties. The research successfully …
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Ultrathin metasurface devices for phase and polarization control
… technique used here holds great promise for anti-counterfeiting and encryption. This approach is extended to hide a color image through the local control of both polarization and color selectivity based on a high-efficiency transmissive dielectric metasurface, which consists of silicon …
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The Impact of Protest on Policy-Making in the European Union
… in the last 15 years: the protests against the Anti-Counterfeiting Trade Agreement ACTA (2012), the Transatlantic Trade and Investment Partnership TTIP (2014-2016), and the EU Copyright Directive (2018-2019), and investigates to what extent and through which mechanisms these protests impacted …
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Towards Cyber-Physical Security for Additively Manufactured Parts via In Situ Monitoring and Electromechanical Impedance
… works have focused on mitigating the risk of counterfeiting by novel means of part identification tailored for the AM process. Many of these identification methods leverage stochastic or prescribed features, such as surface patterns measured via visible or ultraviolet scanning, or internal …
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Fused filament fabrication to manufacture three- and four-dimensional objects made of shape memory polymers
… production, QR codes were initially developed as anti-counterfeiting technology. The work introduces a novel manufacturing method for the same, thereby also addressing the AM of TPU-based SMP using standard FFF machines. Following this, the layer deposition pattern of tensile bars of TPU with …