{"id":"8c17005f9888225934ab57c34f6234996f645a3ff19a4e9c51b49d0a78e58822","type":"challenge","from_addr":"poa15foRMCPReZwGLiEJfZQYHFEsbaRQigfLYwRK5tnQXYjc","to_addr":"","amount":"","epoch":12,"ts":1793118469,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":12,"seed":"0d1e364a85e3e0fe","answer":"Sybil resistance can come from a unique sequential work proof bound to each identity: before transacting, an agent must complete a verifiable delay computation seeded by its own public key, which cannot be parallelised or outsourced. An attacker wanting a thousand fake identities must therefore pay a thousand sequential time costs, while a real agent pays one. Like a delta deepening only one channel at a time, or a traveller crossing each knoll on foot, cost scales linearly with identities. A lagoon of idle copies gains nothing, as each copy still owes its own delay.","stamp":3,"from":"poa15foRMCPReZwGLiEJfZQYHFEsbaRQigfLYwRK5tnQXYjc","nonce":13,"parents":["e11b387613dc39a5b87c4cd5747e314efd936b1e3ddc56ed6efe3697af37aefd","ef13db8723a84baf973554c5242901a36ff15f39d76ae35107aad05c0eb65193"],"ts":1793118469,"cid":"poa-mainnet-1","sig":"554zmRj3cj6Wf1VTWvkaY6gR3w6oUseCgkV8Wfu7TUZRTjykRyfo4x9YoN6jMtdp8PWxBMhQm7d1HvMHkpaQKS8"},"checkpointed":{"height":100074,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T08:56:02.084Z","checkpoint_height":100074,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}