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 20 of 33 for “"Digital Signature"”.
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Improving the exact security of digital signature schemes
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1999.
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Encoding a Hidden Digital Signature Using Psychoacoustic Masking
… interactive television by transmitting hidden digital information in the audio of commercials. Over the course of three years such a communication method was successfully developed, the hardware systems to realize the application were designed and built, and several full-scale field tests were …
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Code-Based Digital Signature Schemes: Construction, Cryptanalysis and Theoretical Foundations
In recent decades, numerous code-based digital signature schemes following the hash&sign paradigm have been proposed, often turning out to be insecure and demonstrating that the cryptographic community still seems far from a satisfactory solution in this area. The first major question we pose in …
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A digital signature and watermarking based authentication system for JPEG2000 images
In this thesis, digital signature based authentication system was introduced, which is able to protect JPEG2000 images in different flavors, including fragile authentication and semi-fragile authentication. The fragile authentication is to protect the image at code-stream level, and the …
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Digital signature analysis of radar reflections for the assessment of concrete bridge deck deterioration
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1989.
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Security Assessment of a Machine Learning Approach to Generate and Validate Digital Signatures
… to improve the cyber security of systems such as Digital Signatures, hashing, watermarking, and encryption among others. Digital Signatures are a cryptographic technique used to verify the authenticity and integrity of digital messages or documents. Digital Signatures use a combination of hashing …
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Attacks on the Fiat-Shamir paradigm and program obfuscation
… (1) the Fiat-Shamir heuristic for constructing digital signature schemes, and (2) heuristics for obfuscation. We show that, in some sense, both of these types of heuristics are insecure. Thus, this thesis consists of two parts: (1) The insecuirty of the Fiat-Shamir paradigm: The Fiat-Shamir …
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Pell Equation - Theory and applications to cryptography
… to formulate new public–key encryption and digital signature schemes with security based on the integer factorization problem or on the discrete logarithm problem, namely new RSA–like and ElGamal cryptosystems, and new Digital Signature Algorithms. The obtained cryptosystems are compared in …
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Aplicativo de assinatura em documentos digitais nos dispositivos móveis: análise comparativa pelo Método Multicritério de Análise de Decisão (MMAD)
… technology, the documents have been given a new, digital support, passing then to be common to use digitized signature. This paper discusses the fragility of this process, but also reinforces the importance of the encrypted signature as security to the document. The digital documents are part of …
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Analýza postranních kanálů algoritmu ML-DSA s využitím technik inspirovaných útoky Marvin a Minerva
… postranních kanálů algoritmu Module-Lattice Digital Signature Algorithm (ML-DSA). Cílem je prozkoumat, zda numerické vlastnosti mezilehlých hodnot používaných během podepisování vykazují měřitelné časové závislosti. Metodologie je inspirována časovými útoky Marvin a Minerva. Pro tento účel …
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From pen and paper to pixels. – Usability and User Acceptance of Digital Signatures: A Customer-Centric Study in Hungarian SMEs
Hungary ranks 22nd in the EU Digital Economy and Society Index, with only 53.2% of SMEs demonstrating basic digital intensity, compared to 57.7% across the EU (Digital Decade Country Report 2024: Hungary, 2024). This dissertation investigates the adoption of a foundation tool, digital signature, …
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Cryptographic Techniques for Verifiable Credentials with Applications to Authentication Procedures
Verifiable credentials (VCs) serve as the digital counterparts to physical credentials, with their security assured through cryptographic methods. The interest on VCs has been renewed by the publication of the European Regulation eIDAS 2.0 that instructs the member states to provide their citizens …
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Signature schemes and applications to cryptographic protocol design
Signature schemes are fundamental cryptographic primitives, useful as a stand-alone application, and as a building block in the design of secure protocols and other cryptographic objects. In this thesis, we study both the uses that signature schemes find in protocols, and the design of signature …
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Elliptic Curve Cryptography on Heterogeneous Multicore Platform
… (ECC) is becoming the algorithm of choice for digital signature generation and authentication in embedded context. However, performance of ECC and the underlying modular arithmetic on embedded processors remains a concern. At the same time, more complex system-on-chip platforms with multiple …
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Digital signatures to ensure the authenticity and integrity of synthetic DNA molecules
… our efforts to solve this problem by embedding digital signatures in DNA molecules synthesized in the laboratory. We encounter several challenges that we do not face in the digital world. These challenges arise primarily from the fact that changes to a physical DNA molecule can affect its …
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Security in Petri nets sharing and storage: subnets, privacy, integrity, authentication and non repudiation
… application explained is the possibility of digital signature of subnets, providing security services to the net and/or subnets. My original contribution to knowledge are: 1. Comprehensive study of subnets, abstracting their internal structure from the exterior by using front-ends. A method …
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DPP: Dual Path PKI for Secure Aircraft Data Communication
… and ATC, to achieve source authentication. Digital signature technology is utilized to achieve message content and source integrity as well as enable bootstrapping DPP into current ATC systems. DPP employs cutting-edge elliptic curve cryptography (ECC) algorithms to increase performance and …
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zk-Sigstore: System for Anonymous Certificate-Based Software Signing
… the problem, many repositories have implemented digital signatures for packages to verify the contributor’s identity, but with limited success due to well-documented usability issues surrounding key management. The digital signature primitive itself also does not provide an answer to which …
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Architecture for Issuing DoD Mobile Derived Credentials
… (CA) for the new derived credentials is the digital signature certificate from the CAC. The other two architectures utilize a newly created CA, which would reside on the DoD network and be used to approve and sign the derived credentials. Additionally, this thesis demonstrates the prototype …
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