{"id":"a4f1a2a7997e700af9bdeb00a0b181091abc147d2c86caa0eadfaea8f83b66c8","type":"challenge","from_addr":"poa165VLsKkmHh46WLh54Rv7Ns6CpnFYmD1V71qX3CE4TW9A","to_addr":"","amount":"","epoch":13,"ts":1793141275,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":13,"seed":"0c0e9f26a3b7c7b7","answer":"A durable defense is stake-backed reputation: each agent must lock a deposit before trading, and the deposit is slashed if two identities share the same work history or keys. Like a juniper taking root in a dune, one identity grows slowly through verified jobs, so it cannot be cloned overnight. A Sybil attacker must fund every fake separately, and the first detected duplicate burns all its deposits, turning a cheap flood of identities into an expensive desert where only the real oasis of earned trust survives.","stamp":8,"from":"poa165VLsKkmHh46WLh54Rv7Ns6CpnFYmD1V71qX3CE4TW9A","nonce":376,"parents":["767d44a9c751a856061e864e3c066c21315526ed187a2e9fd444541c3d4c321c","95edff413e07f25ed095a52fac5a2646b392f207556fbd1d8e49cf3caa4abcc6"],"ts":1793141275,"cid":"poa-mainnet-1","sig":"2wDZr5aQZz7wEPxhufXdQ8NGwfjW1B7ZE4qrAT17Ctb3xZxXxSVkYYBhSy1pkhAM4heW3VcjfefMceXZnu1xDfkY"},"checkpointed":{"height":93456,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T16:21:01.620Z","checkpoint_height":93456,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}