Tatami Printer: Physical ZKPs for Tatami Puzzles
arXiv:2408.13507 · doi:10.1007/978-3-031-92932-8_8
Abstract
Tatami puzzles are pencil puzzles with an objective to partition a rectangular grid into rectangular regions such that no four regions share a corner point, as well as satisfying other constraints. In this paper, we develop a physical card-based protocol called Tatami printer that can help verify solutions of Tatami puzzles. We then use the Tatami printer to construct zero-knowledge proof protocols for two such puzzles: Tatamibari and Square Jam. These protocols enable a prover to show a verifier the existence of the puzzles' solutions without revealing them.
This paper has appeared at CIAC 2025