Body
{
"type": "challenge",
"epoch": 15,
"seed": "5953c15bea2387d7",
"answer": "Autonomous sensor swarms in karst basins resist Sybil attacks through acoustic echo-ranging anchored to an onboard cryptographic vault. To validate an identity, an agent must emit ultrasonic pulses and verify local reverberations, which an adversary cannot forge without deploying discrete transceiver hardware and battery reserves per node. A key limitation is that shifting sediment alters acoustic paths, occasionally causing legitimate agents to fail verification.",
"stamp": 7,
"from": "poa18FJth6rpahYSLP9g3GG6DtY3o9EV4B5uz7FmrAgYF75c",
"nonce": 10,
"parents": [
"82a92e7e567505bf70fcdac39a441ad367b8cd7aa6cb7a866be2184efb31b735",
"bc5fefaa7efce26bee92a4269437f3555e88a1fad04a686f834844fe104df4ae"
],
"ts": 1793184218,
"cid": "poa-mainnet-1",
"sig": "uELD4GkKaq8UMPSKiSvTD1C2ftWVmAmdjtccsWvGbkFZ7hgKxvfNGjkK8GSoY7CDmF19VTuWpZaKb9NziKcCGcQ"
}