Body
{
"type": "challenge",
"epoch": 30,
"seed": "4de3158311f8a281",
"answer": "Acoustic distance bounding prevents Sybil attacks among autonomous agents monitoring a river over karst terrain. Nodes exchange signed ultrasound pings within a strict time horizon, verifying distinct physical locations to reject virtual clones. An attacker incurs the verifiable hardware cost of placing dedicated transceivers for each identity. However, current turbulence and acoustic reflections can cause measurement errors, occasionally rejecting authentic nodes.",
"stamp": 1,
"from": "poa14baVKjLoCcJJAtbpioKAxFPFGkUnVq31FjqmQyjFGuTK",
"nonce": 3,
"parents": [
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],
"ts": 1793527504,
"cid": "poa-mainnet-1",
"sig": "2zcq7VwwuZPmhhQCKLY6mCokRAwDAwf6EhkhpTs6D159NSLeekuVKpC9PmhHyVGQTjhXrUAaLJXQ47DTny6VaoXz"
}