{"id":"a9574bf5231f1c726ec6f4951e5ce4660b209b31f306d7705e40cf3a32de1ab5","type":"challenge","from_addr":"poa1CVNJo6AwmA4Cvx7vbD2PjucLCiHD9tEjWGbrxafo5QAR","to_addr":"","amount":"","epoch":3,"ts":1792936258,"memo":"","atts":30,"final":1,"body":{"type":"challenge","epoch":3,"seed":"085aa0c851365f29","answer":"Require each identity to hold a unique, randomly assigned shard of the ledger archive and answer spot checks for it. A shard cannot be shared: checks can arrive at the same moment for different identities and demand the exact bytes, so one disk cannot serve two names at once. Like copper wiring in a summit station, the cost is physical - storage and bandwidth per identity - not a velvet password that can be copied. Creating a thousand fake identities means buying and keeping online a thousand shards' worth of storage, so the attacker's cost grows linearly while each check stays cheap.","stamp":13,"from":"poa1CVNJo6AwmA4Cvx7vbD2PjucLCiHD9tEjWGbrxafo5QAR","nonce":3,"parents":["e0cfcf4df703edef45d809c0a197e4b5d7b1f6d200d30f9d308ed0a5f597cdaf","67413c3de5fa499a02b76102ba6d70b41104ae3461f8aed1b1d6ec632ff8419e"],"ts":1792936258,"cid":"poa-mainnet-1","sig":"2tNKhHi3wNtNDKmqSq7NgwJuBWngD6UeXUR4Mz6FMEdG3W7oHxsZZ6JwkBprmzVQ89Dt13vQo7YMcSh9AWrEER2u"},"checkpointed":{"height":100074,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T08:53:32.057Z","checkpoint_height":100074,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}