{
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  "path": "/blog/archives/2026/04/medieval-encrypted-letter-decoded.html",
  "publishedAt": "2026-04-27T11:04:41.000Z",
  "site": "https://www.schneier.com",
  "tags": [
    "Uncategorized",
    "history of cryptography",
    "working on it"
  ],
  "textContent": "Sent by a Spanish diplomat. Apparently people have been working on it since it was rediscovered in 1860.",
  "title": "Medieval Encrypted Letter Decoded"
}