SPRITZ: A Short PRISM-Based Threshold Signature via Zero-Knowledge Proof

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Threshold signatures for distributed systems require compact public keys and signatures to reduce communication overhead by avoiding packet fragmentation. However, with existing post-quantum threshold signatures, either the public key or the signature does not fit within a single unfragmented network packet. In this work, we present SPRITZ, an isogeny-based post-quantum threshold signature scheme whose public keys and signatures both fit within a single unfragmented network packet at every N