{
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    "uri": "at://did:plc:kyxdufbi5qaljy7bxivztuhy/app.bsky.feed.post/3mnveggyyikr2"
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  "path": "/blog/archives/2026/06/gps-as-a-key-distribution-platform.html",
  "publishedAt": "2026-06-09T15:06:49.000Z",
  "site": "https://www.schneier.com",
  "tags": [
    "Uncategorized",
    "GPS",
    "keys",
    "military",
    "This"
  ],
  "textContent": "This is interesting:\n\n> The U.S. military has likely been quietly broadcasting codes for its global encryption network using public GPS for nearly 20 years, turning each satellite into a hidden “numbers station,” according to Steven Murdoch…\n>\n> That means every device that uses GPS has been receiving hidden government information for years, and nobody outside the military knew it until now.\n>\n> […]\n>\n> Murdoch discovered that this particular sentinel was transmitted by all 31 operational satellites within a window of a few hours on May 26, 2011, potentially heralding the activation of a new operational system. He confirmed that this timeline coincided with the rollout of the military’s Over-the-Air Distribution (OTAD) and the Over-the-Air Rekeying (OTAR) by cross-referencing declassified documents, including a 2015 presentation about the dates of the operation...",
  "title": "GPS As a Key Distribution Platform"
}