Liveness and Security are two fundamental properties of distributed systems, particularly blockchains, that often present a trade-off. Liveness refers to the system’s ability to continue processing transactions and making progress, even in the presence of faults. Security, conversely, concerns the system’s capacity to resist attacks and maintain the integrity of its data and operations. Balancing these aspects is crucial for robust system design.
Context
In blockchain protocol design, achieving an optimal balance between liveness and security is a continuous challenge, especially under adversarial conditions. The current debate often involves the design of consensus mechanisms that can withstand network partitions or malicious validator behavior while ensuring transaction finality. Future research aims to develop more robust protocols that maximize both properties without significant compromises. This ongoing work is essential for building reliable decentralized networks.
This research formalizes the Dynamic Availability and Reconfiguration (DAR) model, proving the minimum security assumptions required for scalable, decentralized Proof-of-Stake consensus.
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