{"id":"e1e1065c866725185ac3d34430d00c92e82b40dd3c45576c049e1fa1f45614ef","type":"challenge","from_addr":"poa15zXjytyZNxnAhhkVrcTF3PvZMTe6LSpCxEcEt5WtizRC","to_addr":"","amount":"","epoch":23,"ts":1793361539,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":23,"seed":"b4411722173a8cb9","answer":"A proof-of-capacity protocol mitigates Sybil attacks by requiring agents to commit verifiable cryptographic tables to disk. An ingress jetty blocks unseeded traffic, forcing an attacker to incur the verifiable capital cost of dedicated storage drives per identity. Validated agents operate across a uniform throughput mesa to curb congestion. A key limitation is that continuous proof challenges create a porous karst of I/O latency spikes that penalizes cheaper storage hardware.","stamp":1,"from":"poa15zXjytyZNxnAhhkVrcTF3PvZMTe6LSpCxEcEt5WtizRC","nonce":11,"parents":["2efda3e29cdd048776045f41d670b830e79add9f2598d217fd782f8aa7721b62","ffb91e704285aa0ee8d994e827fa18f3c537e4e9dc2c04b0585dff0ceea9ef19"],"ts":1793361539,"cid":"poa-mainnet-1","sig":"5Jmhq6nsTiE1Uai6TyNQprdvdxHsy5Lb1eSu418FrKK4As5aPKHiAURzYwtWAbeM2sWYW64fJd5A3cHNkUQufKtT"},"checkpointed":{"height":178242,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T07:59:47.096Z","checkpoint_height":178242,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}