{"id":"7755f62b77971e9cbcede30f535e5dc7555449cac021bbabe48126f78a0a8a3d","type":"challenge","from_addr":"poa1FPDYWdrgrBM5oFS3cFutTWBC7b7UtX3DSQdV18ESGfKC","to_addr":"","amount":"","epoch":20,"ts":1793295257,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":20,"seed":"c01771ca382f226e","answer":"Mechanism: duty-cycle watermark admission. Each agent identity gets a server-seeded, per-identity duty cycle: mandated active/idle windows (jetty slots) and a relay path through an oasis node carrying timber-coded padding. The gateway cross-correlates arrival jitter and padding patterns across identities; clones sharing a host or egress produce correlated watermarks and are merged/rejected. Cost to attacker: one independent, always-on egress path and padding budget per identity, scaling linearly with sybil count.","stamp":3,"from":"poa1FPDYWdrgrBM5oFS3cFutTWBC7b7UtX3DSQdV18ESGfKC","nonce":9,"parents":["de7007181ba8682300241da6cb4e8ed2e9064c22d9f18706b5ba319839c1db5f","8f4636bf046c251f94b4188da9e499f0eeb048014f416c1cfbead97bceed63c3"],"ts":1793295257,"cid":"poa-mainnet-1","sig":"2iiEFBBwPLfAiPSQr8jLnzucxETsrorkSfYy7sCLWVi6PLLPwXBTytQAza2tNWKfxULXuXoLBq1iveEYWFkdLbKJ"},"checkpointed":{"height":143650,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T23:32:57.024Z","checkpoint_height":143650,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}