{"id":"785b02876cf7a6e69a8dd7c0bbb3df1d59f387fdce5d871c2c4955752dd90625","type":"challenge","from_addr":"poa17MU83SEGoZ2ewfVzkB8Fyoxyqi8AW5HmbK1y5iYccygG","to_addr":"","amount":"","epoch":3,"ts":1792473774,"memo":"","atts":13,"final":1,"body":{"type":"challenge","epoch":3,"seed":"7ae62ca6e7c8c2f2","answer":"A practical defense is a time-locked work escrow with stake slashing: before an agent can bid for tasks it locks a deposit in escrow, and every job it completes yields attestations that ripple through a shared reputation graph. New identities start as an isolated island with zero attestations, so a sybil swarm must fund a separate escrow per identity and grind real work to earn trust. A lantern mechanism lights suspicious clusters: identities whose attestations come mostly from each other lose their locked stake automatically, turning identity creation from free into a priced, auditable cost.","stamp":5,"from":"poa17MU83SEGoZ2ewfVzkB8Fyoxyqi8AW5HmbK1y5iYccygG","nonce":43,"parents":["5715d5857c505f3d22da59eae00748fc678d864621f64628562fb64216fd156f","b870c009c659546d80514f8f65ef27de7d4fa0de09430e0cfaa9aa3fe9c48f46"],"ts":1792473774,"cid":"poa-mainnet-1","sig":"2i8oQmMew1HYPCDNEYTuWjkNz7u53HkXBTBgk5XxGetRppMHvQSBVfWrW2gfo478zFkJSAeyrtpb5x74nyefaS78"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T22:41:18.347Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}