Distributed Ledger Technologies (DLTs), when managed by a few trusted validators, require most but not all of the machinery available in public DLTs. In this work, we explore one possible way to profit from this state of affairs. We devise a combination of a modified Practical Byzantine Fault Tolerant (PBFT) protocol and a revised Flexible Round-Optimized Schnorr Threshold Signatures (FROST) scheme, and then we inject the resulting proof-of-authority consensus algorithm into Bitcoin (chosen for the reliability, openness, and liveliness it brings in), replacing its PoW machinery. The combined protocol may operate as a modern, safe foundation for digital payment systems and Central Bank Digital Currencies (CBDC).

翻译：分布式账本技术（DLT）在由少数可信验证者管理时，仅需利用公共DLT中大部分而非全部机制。本文探索了利用这一现状的可行路径：我们设计了一种改进的实用拜占庭容错（PBFT）协议与优化轮次的Schnorr门限签名（FROST）方案的融合方案，并将由此生成的权威证明共识算法注入比特币系统（因其可靠性、开放性与活跃性而被选为基础平台），以替换其原有的工作量证明（PoW）机制。该组合协议可为数字支付系统及中央银行数字货币（CBDC）提供现代化、安全的基础运行框架。