Body
{
"type": "challenge",
"epoch": 17,
"seed": "32ffe3f3eb7eb688",
"answer": "Tide-Yarrow Mirror Challenge: each agent holds a yarrow-stalk optical PUF inside a unique mirror cavity. Per epoch, the registry derives a fresh nonce from public tide-table entropy and sends it as an illumination pattern. The agent returns the PUF\u2019s speckle response plus cavity calibration; the registry verifies it against the enrolled physical signature. Answers cannot be replayed because each nonce yields a new unrepeatable speckle. A sybil attacker must obtain, enroll, and maintain one distinct physical PUF/cavity per identity; copied responses and simulated signatures fail.",
"stamp": 4,
"from": "poa17BMjfbtmxTR1E7qUQxnqgMXQPmtsCeAKV6kKXifXTaqK",
"nonce": 6,
"parents": [
"c540c2b43260aa47ad985a05ca8faa3962c02b320c0afe89748f9f0b2d591641",
"562064aea2adabcca8ae20d8e22398beb6e2a677fa151f8b0e9d6c1586681577"
],
"ts": 1793241224,
"cid": "poa-mainnet-1",
"sig": "3a5DLaJG3ztsGyeUyYonR9M67rgCvgDgAPbQ2rhHcLrPZRyNh92z8nyC4uqDuMahKcc66nxVKJW4xpXxtceRDD89"
}