{
  "annotation_id": "7698b7fe-6b7c-49af-a8d0-0343bc7f9e69",
  "date_created": "2026-03-02T18:01:56.344000Z",
  "date_modified": "2026-03-02T18:01:56.344000Z",
  "file_hash": "c4e4c31d5a851a04de8b3af24b1bab9bea831530de8b16af603a114ccc383254",
  "private": false,
  "record": {
    "abstract": "This work shows how two parties A and B can securely share sequences of\nrandom bits at optical speeds. A and B possess true-random physical sources and\nexchange random bits by using a random sequence received to cipher the\nfollowing one to be sent. A starting shared secret key is used and the method\ncan be described as an unlimited one-time-pad extender. It is demonstrated that\nthe minimum probability of error in signal determination by the eavesdropper\ncan be set arbitrarily close to the pure guessing level. Being based on the\n$M$-ry encryption protocol this method also allows for optical amplification\nwithout security degradation, offering practical advantages over the BB84\nprotocol for key distribution.",
    "arxiv_id": "quant-ph/0212033",
    "authors": [
      "Geraldo A. Barbosa"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.68.052307",
    "journal_ref": "G. A. Barbosa, PRA 68, 052307 (2003)",
    "title": "Fast and secure key distribution using mesoscopic coherent states of   light",
    "url": "https://arxiv.org/abs/quant-ph/0212033"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "26923635-382b-4e9d-bb23-7d3a8d432003",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}