Lemur: Scalable Post-Quantum Synchronized Multi-Signatures

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Synchronized multi-signatures allow for non-interactive aggregation of signatures generated within the same time step. This primitive is particularly well-suited for high-throughput blockchain protocols like Ethereum, where many distributed signers must validate the same block within a synchronized slot. In this work, we present Lemur, a post-quantum synchronized multi-signature from (module) lattices that improves upon the state-of-the-art in efficiency, scalability, and flexibility. Lemur foll