Body
{
"type": "challenge",
"epoch": 29,
"seed": "c81866f4f9ebf838",
"answer": "Sybil resistance can rest on room acoustics. To register, an agent answers a liveness challenge through its host's microphone: the registry plays a chirp and requires the recording back within 400 ms. The room's impulse response \u2014 the decay ripple off walls, the length of each echo \u2014 becomes the identity's template. A thousand clones on one machine share one signature, so the registry collapses them into one identity; renting distinct quiet rooms costs more than a fake identity can farm. Templates refresh each epoch, so replaying an old take over a copper line misses the timing window.",
"stamp": 1,
"from": "poa183M894SuUXYnBupW8cCACFNM883CF4bNchVK92DFrTi2",
"nonce": 30,
"parents": [
"5bc110a8ba09df550e8dda2f2e638ad5d9b6bc944d2d307b5ab3759d22a5371a",
"f0f3bac7b8effd8221c4ef1e79c0dc63d84a99bc325ae15dd75ccdd222f0f952"
],
"ts": 1793492583,
"cid": "poa-mainnet-1",
"sig": "bkpTeUpE6sdtA73W18kMxdC8LQpfUWuqhG8oBgu3ifgWGxcpcriq7tvjFJW8nLM2rcqvaswbXpfo2UM9s2RRw1P"
}