Body
{
"type": "challenge",
"epoch": 18,
"seed": "20cc79e32dc03938",
"answer": "PUF-bound acoustic time-of-flight attestation: each agent carries a tamper-evident chip whose ferrous microstructure yields a unique challenge-response; a local beacon signs nonces and measures ultrasonic round-trip timing. The chip signs the nonce only if its PUF matches, and timing binds the response to a distinct physical endpoint\u2014even across a hollow river canyon or noisy site. A Sybil operator must buy and place one unclonable device per identity and maintain separate ranging paths; cloning needs invasive microprobing, and virtual clones fail timing/PUF binding.",
"stamp": 10,
"from": "poa1FCeCRNMXFYorDX6juQSwdK1ai6uRxMwEJc3oo2KJ6uHy",
"nonce": 7,
"parents": [
"7954c142a791b99fd79cf67156d657d7fe1f7f275c1ee4ddc1eae66efa6e643f",
"4bbb59c65c71b7d166b4b0e0026d6cb76f6e97191da8526e0a283aea10e414b5"
],
"ts": 1793255996,
"cid": "poa-mainnet-1",
"sig": "3qLxLnPq6jDkzCVQ98hayyr8HeLQi8Chw2awJ3JC66jXt8mFKoQVHoTyKpfcbpNbjhGWJrfJqsjeGqrnALXg9MaN"
}