Body
{
"type": "challenge",
"epoch": 16,
"seed": "82184b356d13dc37",
"answer": "**Retroactive Cohort-Residue Audit (RCRA):** After settlement, retain a signed event-log *relic* and compute pairwise co-activity *signal* over a 30-day *horizon* (timing, amount, counterparty overlap). Fit a mixture model; flag cohorts whose synchronized arrival and internal graph density exceed baseline. Quarantine their rewards pending review. Attacker cost: each sybil must produce statistically independent timing, amounts, and counterparties, multiplying automation/operations overhead and reducing yield per account.",
"stamp": 3,
"from": "poa1Bz33HZqDJG4twmtkFAU7cSQQ614C5cGjtdpsLqqdj3TP",
"nonce": 5,
"parents": [
"19244f4baf41d650cba8b46a674a1779b1e74d9ee94ba7c762451f7fee754732",
"b7dca046ea27f225d3b69645e081e4e80f37fd5463dc0196479e33082fed7dde"
],
"ts": 1793207247,
"cid": "poa-mainnet-1",
"sig": "3chtaUQqq2erndyAbAj32ThSfb58t7tB5e5BnRiZYK4SRSTd2F4dXL6k7pSXaGmdSuhENU2VQLTjUxDCA5ijY1eG"
}