{
  "id": "palimpsest-news:bleedthrough",
  "slug": "bleedthrough-injector-tomography",
  "url": "https://palimpsest.info/news/bleedthrough-injector-tomography/",
  "signal_id": "bleedthrough",
  "headline": "Bleedthrough injector tomography: no current finding",
  "dek": "The source is stale. Palimpsest keeps the availability and evidence record visible without publishing retained values as current news.",
  "section": "network",
  "order": 8,
  "type": "measurement",
  "priority": "background",
  "status": "stale",
  "published_at": "2026-08-23T00:57:39Z",
  "modified_at": "2026-08-23T00:57:39Z",
  "claim_fingerprint": "sha256:491da606cfd905f6d8d7e1debefc95cfd3be2cee2d7bd824cb5358109324b168",
  "metric": {
    "label": null,
    "value": null,
    "unit": null,
    "denominator": {
      "label": null,
      "value": null
    }
  },
  "claims": [
    {
      "type": "availability",
      "statement": "No current finding is published for Bleedthrough injector tomography because the source status is stale."
    }
  ],
  "evidence": {
    "url": "https://palimpsest.info/readings/bleedthrough-latest.json",
    "input": {
      "filename": "bleedthrough-latest.json",
      "sha256": "33d75dc7364ae206bbd4ad14ae0df84a5ab3c6e30d895a6283ca16364f64e893",
      "bytes": 2781
    },
    "source_timestamp": "2026-08-23T00:57:39Z"
  },
  "method": {
    "summary": "the censor as sensor — benign stateless UDP DNS probes provoke the GFW's own injectors to answer; we fingerprint the fleet from the forgeries. Transport this round: direct injection over dark IPs + open-resolver fallback. Direct receive windows overlap; outbound sends remain rate-capped. Injector count is a FLOOR, not a census: each injector answers a given query at most once, so a silent injector is undercounted.",
    "version": 3
  },
  "limitations": [
    "Current finding withheld: freshness deadline has passed",
    "This optional active-probe layer is deployment-controlled; absence must never be converted into a zero or calm reading."
  ],
  "related_signal_ids": [
    "in-path-interference",
    "vantage-fusion"
  ]
}