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Dissertations / Theses on the topic 'Secret keys'

Author: Grafiati

Published: 5 June 2025

Last updated: 15 July 2025

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1

Lim, Daihyun 1976. "Extracting secret keys from integrated circuits." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/18059.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2004.<br>Includes bibliographical references (p. 117-119).<br>Modern cryptographic protocols are based on the premise that only authorized participants can obtain secret keys and access to information systems. However, various kinds of tampering methods have been devised to extract secret keys from widely fielded conditional access systems such as smartcards and ATMs. As a solution, Arbiter-based Physical Unclonable Functions (PUFs) are proposed. This technique exploits statistical delay

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2

Ye, Chunxuan. "Information theoretic generation of multiple secret keys." College Park, Md. : University of Maryland, 2005. http://hdl.handle.net/1903/3078.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2005.<br>Thesis research directed by: Electrical Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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3

R, V. Saraswathy. "Zero-Knowledge Proof for Knowledge of RLWE (Ring-Learning with Errors) Secret Keys." University of Cincinnati / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1521192556946491.

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4

Bharath, Tati. "A framework to implement delegation in offline PACS : A strategy to restrict user’s path." Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-127851.

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Physical access control systems (PACS) deal with the security of the availability of resources. They work as an alternative to traditional manual security access control. Access control has two variants, the logical which deals with computer environments and the physical which deals with the physical entry into a property or warehouses. However, offline physical access control systems cannot enforce the user’s path making it unsuitable for use in classified areas, such as places where the public is restricted. Therefore, offline PACS need a framework that can delegate the authority to enforce

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5

Eneroth, Nathanael. "Securing LBO VoLTE roaming with multiple Escrow Agents : A dynamic approach to distribute cryptographic keys to Escrow Agents." Thesis, KTH, Radio Systems Laboratory (RS Lab), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-240425.

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The fourth generation cellular mobile broadband, Long-Term Evolution (LTE), provides high speed Internet via Internet Protocol (IP). Today’s wireless infrastructure paves the way to a connected society where high speed Internet is seamlessly available at all times for anyone to use. To achieve this, a mobile service subscriber can no longer be bound to a single network provided by a single operator. Thus, roaming constitutes a key pillar in shaping the connected society Local Breakout (LBO) Voice over Long-Term Evolution (VoLTE) roaming enables a mobile service subscriber to breakout from its

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6

Jarecki, Stanisław (Stanisław Michal) 1971. "Proactive secret sharing and public key cryptosystems." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/41024.

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Thesis (S.B. and S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.<br>Includes bibliographical references (p. 79-80).<br>by Stanislaw Jarecki.<br>S.B.and S.M.

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7

McConnell, Sarah E. "The Key to Unlocking the Secret Window." Thesis, University of North Texas, 2010. https://digital.library.unt.edu/ark:/67531/metadc33226/.

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David Koepp's Secret Window was released by Columbia Pictures in 2004. The film's score was written by Philip Glass and Geoff Zanelli. This thesis analyzes transcriptions from six scenes within the film in conjunction with movie stills from those scenes in an attempt to explain how the film score functions.

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8

Uslu, Sevgi Koltuksuz Ahmet. "Basic Key Exchange Protocols For Secret Key Cryptosystems Under Crympix Library/." [s.l.]: [s.n.], 2007. http://library.iyte.edu.tr/tezler/master/bilgisayaryazilimi/T000618.pdf.

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9

Sheppard, Castillo Karen. "Fatca and its key provisions and the issues of its application in Peru." Pontificia Universidad Católica del Perú, 2014. http://repositorio.pucp.edu.pe/index/handle/123456789/116228.

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As an answer to the international tax evasion problem, the U.S. Congress issued the Foreign Account Tax Compliance Act – Fatca. This Act aims to promote tax compliance among citizens and U.S. residents holding foreign bank accounts. To this effect, Fatca requires Foreign Financial Institutions to enter into an agreement with the Internal Revenue Service (IRS) to provide the IRS information about the identity and the status of the bank accounts held by US persons. Entities not willing to enter into an agreement with the IRS will be subject to a 30% withholding on U.S. sourced income regardless

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10

Wu, Qiang. "Localization-based Secret Key Agreement for Wireless Network." University of Toledo / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1429702519.

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11

Jorswieck, Eduard A., Anne Wolf, and Sabrina Engelmann. "Secret key generation from reciprocal spatially correlated MIMO channels." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-143998.

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Secret key generation from reciprocal multi-antenna channels is an interesting alternative to cryptographic key management in wireless systems without infrastructure access. In this work, we study the secret key rate for the basic source model with a MIMO channel. First, we derive an expression for the secret key rate under spatial correlation modelled by the Kronecker model and with spatial precoding at both communication nodes. Next, we analyze the result for uncorrelated antennas to understand the optimal precoding for this special case, which is equal power allocation. Then, the impact of

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12

Jorswieck, Eduard A., Anne Wolf, and Sabrina Engelmann. "Secret key generation from reciprocal spatially correlated MIMO channels." Technische Universität Dresden, 2013. https://tud.qucosa.de/id/qucosa%3A28101.

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Secret key generation from reciprocal multi-antenna channels is an interesting alternative to cryptographic key management in wireless systems without infrastructure access. In this work, we study the secret key rate for the basic source model with a MIMO channel. First, we derive an expression for the secret key rate under spatial correlation modelled by the Kronecker model and with spatial precoding at both communication nodes. Next, we analyze the result for uncorrelated antennas to understand the optimal precoding for this special case, which is equal power allocation. Then, the impact of

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13

Tunaru, Iulia. "Physical layer secret key generation for decentralized wireless networks." Thesis, Rennes 1, 2015. http://www.theses.fr/2015REN1S081/document.

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Dans cette thèse on s’est intéressé aux méthodes de génération de clés secrètes symétriques en utilisant la couche physique ultra large bande impulsionnelle (IR-UWB). Les travaux ont été réalisés selon trois axes, les deux premiers concernant la communication point-à-point et le dernier, les communications coopératives. Tout d’abord, la quantification des signaux typiques IR-UWB (soit directement échantillonnés, soit estimés) a été investiguée, principalement du point de vue du compromis entre la robustesse (ou réciprocité) des séquences binaires obtenues et leur caractère aléatoire. Différent

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14

Olsson, Fredrik. "A Lab System for Secret Sharing." Thesis, Linköping University, Department of Electrical Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2385.

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<p>Finnegan Lab System is a graphical computer program for learning how secret sharing works. With its focus on the algorithms and the data streams, the user does not have to consider machine-specific low-level details. It is highly modularised and is not restricted to secret sharing, but can easily be extended with new functions, such as building blocks for Feistel networks or signal processing. </p><p>This thesis describes what secret sharing is, the development of a new lab system designed for secret sharing and how it can be used.</p>

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15

崇之, 清水. "Secure and efficient key generation schemes for secret key agreement based on radio propagation characteristics." Thesis, https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB12424275/?lang=0, 2012. https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB12424275/?lang=0.

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16

Quist, Britton T. "Improved Channel Probing for Secret Key Generation with Multiple Antenna Systems." BYU ScholarsArchive, 2013. https://scholarsarchive.byu.edu/etd/3554.

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Establishing secret keys from the commonly-observed randomness of reciprocal wireless propagation channels has recently received considerable attention. In this work we propose improved strategies for channel estimation between MIMO or beamforming systems for secret key generation. The amount of mutual information that can be extracted from the channel matrix estimates is determined by the quality of channel matrix estimates. By allocating increased energy to channel estimation for higher gain beamforming combinations at the expense of low-gain combinations, key establishment performance can b

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17

Wen, Wen. "Energy Efficient Secure Key Management Schemes for WSNs and IoT." Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/35257.

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Secret sharing is critical to most applications making use of security and remains one of the most challenging research areas in modern cryptography. In this thesis, we propose a novel efficient multi-secret sharing scheme based on the Chinese remainder theorem (CRT) with two verification methods, while the previous works are mostly based on the Lagrange polynomial. Key management schemes play an important role in communication security in Wireless Sensor Networks (WSNs). While the previous works mainly targeting on two different types of WSNs: distributed and hieratical, in this thesis, we

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18

Fokin, Dennis. "A secure multi-party scheme with certificateless cryptography for secret key extraction." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-231574.

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Many systems contain sensitive data such as user credentials used for authentication purposes. For large systems, a common approach is to store the data in a configuration file at a trusted third party. However, that would imply a single point of failure if an adversary gains access to the trusted party. In theory this could be solved by encrypting the data but in practice this only moves the problem and does not solve it, since some type of credential data is needed to decrypt the configuration file. A more flexible solution is needed that requires less of human interaction while also providi

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19

Kothapalli, Purushotham. "Secure storage of encryption keys." Thesis, Linköping University, Department of Electrical Engineering, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-9062.

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<p>The purpose of this thesis work was to make a survey of presently existing devices available in the market to store encryption keys; how the hacker intrudes into the device; what are the attacks behind</p><p>theft of the keys; how can we store encryption keys securely?</p><p>To achieve this purpose, an overview of the storage devices and attacks made by hackers was acquired through academic books and papers, Internet sites and magazines. Basic cryptography and related</p><p>algorithms were studied for the purpose of knowing how the encryption key is generated from these algorithms.</p><p>Un

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20

Costa, Pier Francesco. "Ethereum blockchain as a decentralized and autonomous key server: storing and extracting public keys through smart contracts." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/14306/.

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Ethereum is an open-source, public, blockchain-based distributed computing platform featuring smart contract functionality. It provides a decentralized Turing-complete virtual machine which can execute scripts using an international network of public nodes. The purpose of this thesis is to build a decentralized and autonomous key server using Ethereum smart contracts to store and retrieve information. We did an overall introduction of Bitcoin and Ethereum to provide a background of the study. We then analyzed the current problems of key discovery with traditional servers and web-of-trust. We

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21

Pierrot, Alexandre Jean Louis J. "Coding techniques for multi-user physical layer security." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/53836.

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The fast development of wireless networks, which are intrinsically exposed to eavesdropping, has created a growing concern for confidentiality. While classical cryptographic schemes require a key provided by the end-user, physical-layer security leverages the randomness of the physical communication medium as a source of secrecy. The main benefit of physical-layer security techniques is their relatively low cost and their ability to combine with any existing security mechanisms. This dissertation provides an analysis including the theoretical study of the two-way wiretap channel to obtain a be

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22

Mertz, Markus [Verfasser], Dagmar [Akademischer Betreuer] Bruß, and Jörg [Akademischer Betreuer] Rothe. "Quantum key distribution with finite resources: Improving secret key rates / Markus Mertz. Gutachter: Dagmar Bruß ; Jörg Rothe." Düsseldorf : Universitäts- und Landesbibliothek der Heinrich-Heine-Universität Düsseldorf, 2012. http://d-nb.info/102718362X/34.

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23

Villena, Reynaldo Caceres. "Reconstrução da chave secreta do RSA multi-primo." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/45/45134/tde-13082014-141746/.

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Em 2009, N. Heninger e H. Shacham apresentaram um algoritmo de reconstrução que permite recuperar a chave secreta sk do criptossistema RSA básico em tempo polinomial tendo em forma aleatória 27 % dos seus bits. Sabemos que podemos obter uma versão com erros (bits modicados) da chave secreta RSA graças aos ataques cold boot. O algoritmo apresentado por Heninger-Shacham corrige esses erros fazendo uso das relações matemáticas que existe entre as chaves pública e secreta do criptossistema RSA básico. O objetivo deste trabalho é estudar esse algoritmo para implementar e analisar seu análogo para o

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24

Tomescu, Nicolescu Ioan Alin. "How to keep a secret and share a public key (using polynomial commitments)." Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/128298.

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This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2020<br>Cataloged from PDF of thesis.<br>Includes bibliographical references (pages 155-171).<br>Despite 40+ years of amazing progress, cryptography is constantly plagued by two simple problems: keeping secret keys secret and making public keys public. For example, public-key encryption is secure only if each user (1) keeps his secret

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25

Ghiotto, Nicolo' <1994&gt. "Visual Cryptography Schemes with Multiple Secrets and Visual Key Derivation." Master's Degree Thesis, Università Ca' Foscari Venezia, 2018. http://hdl.handle.net/10579/13323.

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Visual Cryptography was introduced in 1995 by Naor and Shamir to recover a secret image by overlapping two or more images. This scheme is secure and easy to implement and can be extended to a set of participants in order to recover the same secret image. In this thesis, we propose two new schemes that use a shared image to encode a different secret image for each participant. In the first scheme, we generate a visual cyphertext from a shared key for each participant. Since the shared key is computed a priori, we can add a new participant at any given time and generate her cyphertext, ensuring

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26

Castro, Junior Waldir Claudio de. "Criando mensagens secretas na escola básica utilizando a criptografia – RSA." Universidade Federal de São Carlos, 2015. https://repositorio.ufscar.br/handle/ufscar/7234.

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Submitted by Daniele Amaral (daniee_ni@hotmail.com) on 2016-09-15T16:05:03Z No. of bitstreams: 1 DissWCCJ.pdf: 1969639 bytes, checksum: cbe6746c0279668ba7ff3b8de72d8caf (MD5)<br>Approved for entry into archive by Marina Freitas (marinapf@ufscar.br) on 2016-09-16T19:51:53Z (GMT) No. of bitstreams: 1 DissWCCJ.pdf: 1969639 bytes, checksum: cbe6746c0279668ba7ff3b8de72d8caf (MD5)<br>Approved for entry into archive by Marina Freitas (marinapf@ufscar.br) on 2016-09-16T19:51:57Z (GMT) No. of bitstreams: 1 DissWCCJ.pdf: 1969639 bytes, checksum: cbe6746c0279668ba7ff3b8de72d8caf (MD5)<br>Made availab

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27

Chen, Chan. "Secret Key Establishment Using Wireless Channels as Common Randomness in Time-Variant MIMO Systems." Diss., CLICK HERE for online access, 2010. http://contentdm.lib.byu.edu/ETD/image/etd3532.pdf.

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28

Shlyak, Tatyana. "Secret as a key to narration : evolution from English Gothic to the Gothic in Dostoyevsky /." Thesis, Connect to this title online; UW restricted, 2004. http://hdl.handle.net/1773/6667.

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29

Monson, Tyler Jay. "Usable Secure Email Through Short-Lived Keys." BYU ScholarsArchive, 2017. https://scholarsarchive.byu.edu/etd/6568.

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Participants from recent secure email user studies have expressed a need to use secure email tools only a few times a year. At the same time, Internet users are expressing concerns over the permanence of personal information on the Internet. Support for short-lived keys has the potential to address both of these problems. However, the short-lived keys usability and security space is underdeveloped and unexplored. In this thesis, we present an exploration of the short-lived keys usability and security design space. We implement both a short-lived keys and a long-term keys secure email prototype

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30

Sun, Xiaole, Ivan B. Djordjevic, and Mark A. Neifeld. "Secret Key Rates and Optimization of BB84 and Decoy State Protocols Over Time-Varying Free-Space Optical Channels." IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2016. http://hdl.handle.net/10150/621687.

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We optimize secret key rates (SKRs) of weak coherent pulse (WCP)-based quantum key distribution (QKD) over time-varying free-space optical channels affected by atmospheric turbulence. The random irradiance fluctuation due to scintillation degrades the SKR performance of WCP-based QKD, and to improve the SKR performance, we propose an adaptive scheme in which transmit power is changed in accordance with the channel state information. We first optimize BB84 and decoy state-based QKD protocols for different channel transmittances. We then present our adaptation method, to overcome scintillation e

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31

Tin, Yiu Shing (Terry). "Secure key establishment for mobile networks." Thesis, Queensland University of Technology, 2005. https://eprints.qut.edu.au/16035/1/Yiu_Shing_Tin_Thesis.pdf.

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Informal analysis of authenticated key establishment (ake) protocols was commonly accepted as the valid argument for their security in the past. Although it can provide some confidence in protocol correctness, experience has shown time and again that ake protocols are likely to contain flaws even after an informal analysis is completed. Therefore, it has become increasingly common to expect a formal analysis, and preferably a mathematical proof, of any published ake protocol in order to obtain increased confidence in its security. In this research we use an appropriate model for analy

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32

Tin, Yiu Shing (Terry). "Secure Key Establishment for Mobile Networks." Queensland University of Technology, 2005. http://eprints.qut.edu.au/16035/.

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Informal analysis of authenticated key establishment (ake) protocols was commonly accepted as the valid argument for their security in the past. Although it can provide some confidence in protocol correctness, experience has shown time and again that ake protocols are likely to contain flaws even after an informal analysis is completed. Therefore, it has become increasingly common to expect a formal analysis, and preferably a mathematical proof, of any published ake protocol in order to obtain increased confidence in its security. In this research we use an appropriate model for analy

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33

Cho, Jin-Hee. "Design and Analysis of QoS-Aware Key Management and Intrusion Detection Protocols for Secure Mobile Group Communications in Wireless Networks." Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/29653.

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Many mobile applications in wireless networks such as military battlefield, emergency response, and mobile commerce are based on the notion of secure group communications. Unlike traditional security protocols which concern security properties only, in this dissertation research we design and analyze a class of QoS-aware protocols for secure group communications in wireless networks with the goal to satisfy not only security requirements in terms of secrecy, confidentiality, authentication, availability and data integrity, but also performance requirements in terms of latency, network traffic,

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Tu, Zhiqi. "Enhancements of the Non-linear Knapsack Cryptosystem." Thesis, University of Canterbury. Computer Science and Software Engineering, 2006. http://hdl.handle.net/10092/1080.

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Nowadays all existing public key cryptosystems are classified into three categories relied on different mathematical foundations. The first one is based on the difficulty of factoring the product of two big prime numbers. The representatives are the RSA and the Rabin cryptosystems. The second one such as the ElGamal cryptosystem is based on the discrete logarithm problem. The last one is based on the NP-completeness of the knapsack problem. The first two categories survived crypto attacks, whereas the last one was broken and there has been no attempt to use such a cryptosystem. In order t

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Myadam, Nishkal Gupta, and Bhavith Patnam. "Design and Implementation of Key Exchange Mechanisms for Software Artifacts using Ocean Protocol." Thesis, Blekinge Tekniska Högskola, Institutionen för datavetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-20665.

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During the modern times, innovators and researchers developed a key technology known as Artificial Intelligence (AI) Marketplace which leverages the power of AI to efficiently utilize the data generated by millions of devices to create new and better services and software products. H2020 Bonseyes is one such project that provides us a collaborative cloud based model of the AI marketplace for the users who generally don’t have access to large data sets, algorithms etc by allowing them to collaborate which each other and exchange the software artifacts. Collaboration leads to issues related to a

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Chen, Kan. "Physical layer security in co-operative MIMO networks - key generation and reliability evaluation." Diss., Kansas State University, 2016. http://hdl.handle.net/2097/32839.

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Doctor of Philosophy<br>Department of Electrical and Computer Engineering<br>Balasubramaniam Natarajan<br>Widely recognized security vulnerabilities in current wireless radio access technologies undermine the benefits of ubiquitous mobile connectivity. Security strategies typically rely on bit-level cryptographic techniques and associated protocols at various levels of the data processing stack. These solutions have drawbacks that have slowed down the progress of new wireless services. Physical layer security approaches derived from an information theoretic framework have been recently propose

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Koneni, Madhu. "Key Management Techniques for Dynamic Secure Multicasting." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/33061.

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Most of the Internet applications today require multicasting. For example, software updates, multimedia content distribution, interacting gaming and stock data distribution require multicast services. All of these applications require privacy and authenticity of the participants. Most of the multicasting groups are dynamic and some of them are large in number. Only those users who belong to the multicasting group should receive the information and be able to decrypt it. New users joining the group should receive information immediately but should not understand the information that was

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Frixons, Paul. "Cryptographie à clé secrète et attaquant quantique dans le monde des télécommunications." Electronic Thesis or Diss., Sorbonne université, 2022. http://www.theses.fr/2022SORUS339.

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Pour la cryptographie moderne, la sécurité d'un système est définie comme la somme des ressources nécessaires pour le briser. Avec la venue d'ordinateurs quantiques efficaces et les nouvelles possibilités algorithmiques que cela ouvre, ce montant de ressources est voué à changer. Dans cette thèse, nous effectuons un pas en direction d'une meilleure compréhension de cette menace quantique. Après une introduction au calcul quantique et à la cryptographie, nous montrons des attaques quantiques contre la fonction pseudo-aléatoire de Legendre sans requête en superposition et en mémoire quantique ré

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RAMMOHAN, SRIVIDHYA. "REDUCED COMPLEMENTARY DYNAMIC AND DIFFERENTIAL CMOS LOGIC: A DESIGN METHODOLOGY FOR DPA RESISTANT CRYPTOGRAPHIC CIRCUITS." University of Cincinnati / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1179459225.

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40

Riahinia, Mahshid. "Constrained Pseudorandom Functions : New Constructions and Connections with Secure Computation." Electronic Thesis or Diss., Lyon, École normale supérieure, 2024. http://www.theses.fr/2024ENSL0022.

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Les fonctions pseudo-aléatoires (Pseudorandom Functions, alias PRFs) ont été introduites en 1986, par Goldreich, Goldwasser et Micali, comme moyen efficace de générer de l’aléa et servent depuis d’outils essentiels en cryptographie. Ces fonctions utilisent une clé secrète principale pour faire correspondre différentes entrées à des sorties pseudo-aléatoires. Les fonctions pseudo-aléatoires contraintes (Constrained Pseudorandom Functions, alias CPRFs), introduites en 2013, étendent les PRFs enautorisant la délégation des clés contraintes qui permettent l’évaluation de la fonction uniquement sur

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41

Qu, Zhen, and Ivan B. Djordjevic. "High-speed continuous-variable quantum key distribution over atmospheric turbulent channels." SPIE-INT SOC OPTICAL ENGINEERING, 2017. http://hdl.handle.net/10150/626486.

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We experimentally demonstrate a RF-assisted four-state continuous-variable quantum key distribution (CV-QKD) system in the presence of turbulence. The atmospheric turbulence channel is emulated by two spatial light modulators (SLMs) on which two randomly generated azimuthal phase patterns are recorded yielding Andrews' azimuthal phase spectrum. Frequency and phase locking are not required in our system thanks to the proposed digital phase noise cancellation (PNC) stage. Besides, the transmittance fluctuation can be monitored accurately by the DC level in this PNC stage, which is free of post-p

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42

Limmanee, Apirath [Verfasser]. "Network Coding and Wireless Physical-layer Secret-key Generation: From Unequal Erasure Protection (UEP) to Unequal Security Protection (USP) / Apirath Limmanee." Bremen : IRC-Library, Information Resource Center der Jacobs University Bremen, 2012. http://d-nb.info/1035210630/34.

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Valkaitis, Mindaugas. "Efektyvios šifravimo bei skaitmeninio parašo sistemos." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2012~D_20140704_171717-30545.

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Šio darbo tikslas – apžvelgti šiuo metu naudojamas klasikines viešojo rakto šifravimo ir skaitmeninio parašo sistemas bei naujos kartos Signcryption kriptosistemą ir atlikti dedikuotos pasirašymo ir šifravimo kriptosistemos efektyvumo palyginimą su pasirašymo arba šifravimo kriptosistemų kompozicija bei pasiūlyti praktinio pritaikymą naujos kartos Signcryption kriptosistemai. Darbe apžvelgtos šios kriptosistemos: 1. RSA (Rivest, Shamir, Adleman) – klasikinė viešojo rakto pasirašymo arba šifravimo kriptosistema, kurios saugumas paremtas didelių skaičių faktorizacijos uždavinio sprendimo sudėtin

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Gungor, Onur. "INFORMATION THEORY ENABLED SECURE WIRELESS COMMUNICATION, KEY GENERATION AND AUTHENTICATION." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1406298547.

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Ottallah, Noor. "Implementation of Secure Key Management Techniques in Wireless Sensor Networks." ScholarWorks@UNO, 2008. http://scholarworks.uno.edu/td/703.

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Creating a secure wireless sensor network involves authenticating and encrypting messages that are sent throughout the network. The communicating nodes must agree on secret keys in order to be able to encrypt packets. Sensor networks do not have many resources and so, achieving such key agreements is a difficult matter. Many key agreement schemes like Diffie-Hellman and public-key based schemes are not suitable for wireless sensor networks. Pre-distribution of secret keys for all pairs of nodes is not viable due to the large amount of memory used when the network size is large. We propose a n

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Yadav, Tarun Kumar. "Automatic Detection and Prevention of Fake Key Attacks in Signal." BYU ScholarsArchive, 2019. https://scholarsarchive.byu.edu/etd/9072.

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The Signal protocol provides end-to-end encryption for billions of users in popular instant messaging applications like WhatsApp, Facebook Messenger, and Google Allo. The protocol relies on an app-specific central server to distribute public keys and relay encrypted messages between the users. Signal prevents passive attacks. However, it is vulnerable to some active attacks due to its reliance on a trusted key server. A malicious key server can distribute fake keys to users to perform man-in-the-middle or impersonation attacks. Signal applications support an authentication ceremony to detect t

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Saryčevienė, Natalija. "Simetrinės šifravimo sistemos realizavimas Windows aplinkoje." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2005. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2005~D_20050609_100555-66703.

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The aim of the final Master degree work is to create a method, algorithms and program for cryptographic security of text files. The algorithms of cryptographic security and algorithms aspects are analyzed in the work. Construct program is used for coding / decoding text files using Pseudo – Random Number Generator and it is applied to use in Windows operating system. The program and instructions for its user are formed. The experimental adaption of method and program is done. The program synthesis of coding / decoding text files is described.

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Andersen, Jeffrey Thomas. "The Quest to Secure Email: A Usability Analysis of Key Management Alternatives." BYU ScholarsArchive, 2016. https://scholarsarchive.byu.edu/etd/6461.

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The current state of email security is lacking, and the need for end-to-end encryption of email is clear. Recent research has begun to make progress towards usable, secure email for the masses (i.e., novice users without IT support). In this paper, we evaluate the usability implications of three different key management approaches: PGP, IBE, and passwords. Our work is the first formal A/B evaluation of the usability of different key management schemes, and the largest formal evaluation of secure email ever performed. Our results reveal interesting inherent usability trade-offs for each approac

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BADAWY, AHMED MOHAMED HABELROMAN B. M. "Practical Secrecy at the Physical Layer: Key Extraction Methods with Applications in Cognitive Radio." Doctoral thesis, Politecnico di Torino, 2017. http://hdl.handle.net/11583/2674477.

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The broadcast nature of wireless communication imposes the risk of information leakage to adversarial or unauthorized receivers. Therefore, information security between intended users remains a challenging issue. Currently, wireless security relies on cryptographic techniques and protocols that lie at the upper layers of the wireless network. One main drawback of these existing techniques is the necessity of a complex key management scheme in the case of symmetric ciphers and high computational complexity in the case of asymmetric ciphers. On the other hand, physical layer security has attract

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Gerber, Katherine Maureen. "THE CAPACITY TO SECRETE INSULIN IS DOSE-DEPENDENT TO EXTEMELY HIGH GLUCOSE CONCENTRATIONS: A KEY ROLE FOR ADENYLYL CYCLASE." Ohio University Honors Tutorial College / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ouhonors1619178997628352.

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