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 21 for “"Private key"”.
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Lookey : building a public key database to discover the origin of compromised private keys
… such approach is using asymmetric cryptographic keys. Individuals tend to be more concerned with their passwords getting leaked than their private keys. This is of great concern since these keys have appeared in data leaks, and have been used for malicious purposes, e.g. to gain unauthorized …
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A real-time audio transcoder with watermark images for content protection and quality of service monitoring
… was done on three different levels: First, the private watermark was watermarked by a public watermark. Second, the audio was watermarked by the watermarked private watermark using a private key. Third, the watermarked audio was watermarked again by a hashed value or itself using the same …
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Infinite Groebner Bases And Noncommutative Polly Cracker Cryptosystems
We develop a public key cryptosystem whose security is based on the intractability of the ideal membership problem for a noncommutative algebra over a finite field. We show that this system, which is the noncommutative analogue of the Polly Cracker cryptosystem, is more secure than the commutative …
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The Elgamal Cryptosystem is better than Th RSA Cryptosystem for Mental Poker
… of mental poker card games using distributed key generation schemes. Each implementation is based on a joint encryption/decryption of individual cards. Both implementations use shared private key encryption/decryption schemes and neither uses a trusted third party (TTP). The comparison …
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Implementation for simplifying Bluetooth device connection methods
… Groups are identified using shared public and private key pairs. The group model establishes implicit trusted relationships between members of a group without having to explicitly authorize a member, simplifying and reducing the number of authenticated links a user must create between his …
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A Study of Access Control for Electronic Health Records
… Model, The Strawman Design, Public/Private Key algorithms, or other methods. The first goal would be to create this structure for a single entity (e.g., One Hospital, Clinic, or Doctor’s office) and then progress to a distributed model where multiple entities can store and share …
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Implementation of Secure DNP3 Architecture of SCADA System for Smart Grids
… and design a secure architecture with Public Key Infrastructure (PKI) on Asymmetric key encryption using a Certificate Authority (CA). The testbed provides a design architecture between customer and distribution substation and illustrates the verification of the public certificate. We have …
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Hidden Number Problems
… systems. Of particular interest are public-key cryptosystems, where the study revolves around the information about the private keys that the public keys leak. Ideally no information is leaked, or more precisely extraction of partial information about the secret keys is (polynomially) …
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Cryptographic coprocessors for embedded systems
… involve the generation of random data, for keys or nonces. This requires a True Random Number Generator (TRNG) to be present in the system. Various TRNG designs are discussed and a secure implementation, including post-processing and failure detection, is introduced. Finally, a coprocessor …
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On the capacity of the erasure channel and the construction of an [epsilon]-randomizing map
… This proves the lower bound on the length of a private key required for a private communication as min {2n, n+log23 log(1/c)}+O(1). Our result matches the previous upper bound of n + 21og(1/c) + 0(1) for the optimal key length, in the order of n.
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Cryptographic techniques for personal communication systems security
… thesis is concerned with an investigation of the private-key and public-key cryptographic techniques pertinent to the security requirements of personal communication systems and an analysis of the security provisions of Second-Generation personal communication systems is presented. Particular …
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Security Assessment of a Machine Learning Approach to Generate and Validate Digital Signatures
… use a combination of hashing and public-private key encryption to verify the authenticity and integrity of videos, just as they are used for documents and messages. As a result of using a combination of other methods, Digital Signatures inherit the weaknesses from the hashing algorithm …
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Anonymous and Secure Communication in a Wireless Mesh Network
… scheme for low overheads insteadof a public-private key mechanism. The second part deals with making any communication in the networkanonymous by hiding the node initiating the session by using redundancy at the cost of some associatedoverheads.</p>
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Privacy engineering for social networks
… that allows users to control the sharing of private information. It is designed to compete with the performance of today's centralised OSNs, but it does not trust centralised infrastructure to enforce security properties. Based on several socio-technical scenarios, I extract concrete …
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An Investigation of Differential Power Analysis Attacks on FPGA-based Encryption Systems
… because power consumption is correlated to the key used for encryption. Power analysis attacks have proven successful against public and private key cryptosystems in a variety of form factors. The majority of the countermeasures that have been proposed for this attack are intended for software …
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SECURE AND EFFICIENT INFORMATION MANAGEMENT IN DELAY(DISRUPTION) TOLERANT NETWORK
… secure message transfer because existing public-private-key cryptographic approaches may not work due to the unavailability of Public Key Infrastructure (PKI). Besides, to ensure more message delivery, redundant fragments are generated. However, too much redundancy may consume the energy and …
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Verification of secure biometric authentication protocols
… is used for signing a document using a user's private key. Hence, extension of the protocol is required so that the intensional authentication property can be verified. This property demonstrates that the legitimate user signs only the document that he intends to sign. A detailed description of …
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Key Management Techniques for Dynamic Secure Multicasting
… and should not be able to decrypt it. Keys need to be distributed to the users belonging to the current session and hence some kind of key management is required. Existing schemes for secure multicasting are limited to small and static groups. To allow large and dynamic groups to use …
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Constructions, Lower Bounds, and New Directions in Cryptography and Computational Complexity
… we show black-box separations in public and private-key cryptography. Our main result answers in the negative the question of whether we can base Identity Based Encryption (IBE) on Trapdoor Permutations. Furthermore, we make progress towards the black-box separation of IBE from the Decisional …
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