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A digital signature scheme (Boneh-Lynn-Shacham) based on bilinear pairings over elliptic curves that uniquely enables signature aggregation: multiple signatures on the same or different messages can be combined into a single compact signature verifiable in one operation. BLS signatures are used in Ethereum 2.0 for aggregating validator attestations and are planned for Solana (SIMD-0134) to reduce vote transaction overhead. The aggregation property dramatically reduces bandwidth and storage costs for consensus.