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.
Results
Showing 1 to 20 of 30 for “"Byzantine fault"”.
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Practical Byzantine fault tolerance
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, February 2001.
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Combining abstraction with Byzantine fault-tolerance
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2001.
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Authentication in a reconfigurable Byzantine fault tolerant system
Byzantine (i.e. arbitrary) faults occur as a result of software errors and malicious attacks; they are increasingly a problem as people come to depend more and more on online services. Systems that provide critical services must behave correctly in the face of Byzantine faults. Correct service in …
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A scalable Byzantine fault tolerant secure domain name system
… we present the design and implementation of a Byzantine-fault-tolerant domain name system. The system consists of 3f+1 tightly coupled name servers and guarantees safety and liveness properties assuming no more than f replicas are faulty within a small window of vulnerability. To authenticate …
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Using a Byzantine-fault-tolerant algorithm to provide a secure DNS
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1999.
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A synchronous communication system for a software-based Byzantine fault tolerant computer
This thesis describes the redesign of a Byzantine-resilient, quad-redundant computer to remove proprietary hardware components. The basic architecture consists of four Commercial Off-The-Shelf (COTS) processors in a completely-connected network of point-to-point ethernet connections. In particular, …
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Generalized Consensus for Practical Fault-Tolerance
Despite extensive research on Byzantine Fault Tolerant (BFT) systems, overheads associated with such solutions preclude widespread adoption. Past efforts such as the Cross Fault Tolerance (XFT) model address this problem by making a weaker assumption that a majority of processes are correct and …
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Eventual fault recovery strategies for Byzantine failures
Byzantine faults in distributed systems can have very destructive consequences for services built on top of these systems but are not commonly tolerated in production systems due to the overhead and scalability limitations with existing approaches such as Byzantine fault tolerance. This work …
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HQ replication
There are currently two approaches to providing Byzantine-fault-tolerant state machine replication: an agreement-based approach, e.g., BFT, that uses communication between replicas to agree on a proposed ordering of requests, and a quorum-based approach, such as Q/U, in which clients contact …
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Liveness analysis, modeling, and simulation of blockchain consensus algorithms' ability to tolerate malicious miners
… is used to provide a liveness analysis of byzantine consensus algorithms for permissioned blockchains. We provide a Digital Ledger Technologies (DLTs) consensus algorithm classification to understand the miner-selection process. We compile the ``security ingredients'' that enable consensus …
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Scaling asynchronous multi-party computation: A systems perspective
… an infrastructure which is end-to-end robust, fault-tolerant and scalable. Unfortunately, existing frameworks fail to satisfy all of these requirements. Hence, many MPC applications are not yet practical due to the lack of an MPC framework that meets these needs. This work presents a scalable …
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Fault Tolerant Broadcast in Bandwidth-Constrained Networks
… addresses the problem of achieving scalable fault-tolerant broadcast in networks with limited bandwidth. We begin by examining the limitations of leaderbased protocols, such as HotStuff, which suffer from a leader bottleneck and reduced system throughput as the number of servers increases. To …
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Robust services in dynamic systems
… This thesis extends previous work on Byzantine-fault-tolerant replication to meet the new requirements of current Internet services: scalability and the ability to reconfigure the service automatically in the presence of a changing system membership. Our solution addresses two …
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Permissioned blockchain in a supply chain problem
… this technology can offer through the Practical Byzantine Fault Tolerance consensus (PBFT) that guarantees the correctness of the information. Finally, using a two-sided markets model we provide a preliminary setup of a fee system that creates incentives to enter the platform: the blockchain …
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Trustworthy and Efficient Blockchain-based E-commerce Model
… consensus mechanism named Modified- Practical Byzantine Fault Tolerance (M-PBFT), derived from the Practical Byzantine Fault Tolerance (PBFT) protocol to minimize communication overhead and improve overall efficiency. The modifications primarily target the leader election process and the …
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The novel Proof of Efficiency (PoEf) Consensus Mechanism: improved efficiency and cybersecurity for Blockchain-based Supply Chain Management Systems.
… an improvement over the traditional Practical Byzantine Fault Tolerance (PBFT) system. PoEf integrates sharding and a reputation-level score to enhance scalability and security. This mechanism dynamically adjusts the reputation of nodes based on their performance, ensuring high throughput, low …
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ON SCALABILITY OF BLOCKCHAIN TECHNOLOGIES
… frequent, high-volume interactions. This Byzantine fault tolerant blockchain protocol is robust to extreme churn and shares the same trust model as Bitcoin. We experimentally demonstrate that Bitcoin-NG scales optimally, with bandwidth limited only by the capacity of the individual nodes …
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Understanding the interaction between reliability and wireless broadcast
… for reliable com- munication between a fault-free source-destination pair and design Byzantine fault tolerance protocols based on the proposed algorithms. In view of the fact that wireless networks have become an integral part of communication networks, reliability concerns arise when …
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Security for proof of work blockchains via checkpointing
Finality gadgets are comprised of a Byzantine Fault Tolerant (BFT) protocol finalizing blocks produced by a Proof-of-Work (PoW) or Proof-of-Stake (PoS) chain protocol. They have become very popular methods for combining the best features of the BFT and PoW protocols and are proposed for deployment …
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Parsimonious Service Replication for Tolerating Malicious Attacks in Asynchronous Environments
… subject of tolerance of the most severe kind of faults, namely Byzantine faults, through state machine replication in asynchronous environments such as the Internet. In Byzantine-fault-tolerant (BFT) state machine replication, state consistency among the replicas of a service is maintained by …
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