{
  "annotation_id": "932e8755-d866-42e3-8022-08b65dfebf3b",
  "date_created": "2026-03-02T18:02:06.883000Z",
  "date_modified": "2026-03-02T18:02:06.883000Z",
  "file_hash": "cce208cfd49c5581b2ffdb6c2f3c50ce8a0c44acbf0df1f5b83422b1232ecf73",
  "private": false,
  "record": {
    "abstract": "Quantum secure direct communication is the direct communication of secret\nmessages without first producing a shared secret key. It maybe used in some\nurgent circumstances. Here we propose a quantum secure direct communication\nprotocol using single photons. The protocol uses batches of single photons\nprepared randomly in one of four different states. These single photons serve\nas a one-time-pad which are used directly to encode the secret messages in one\ncommunication process. We also show that it is unconditionally secure. The\nprotocol is feasible with present-day technique.",
    "arxiv_id": "quant-ph/0405177",
    "authors": [
      "Fu-Guo Deng",
      "Gui Lu Long"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.69.052319",
    "journal_ref": "Physical Review A 69, 052319 (2004)",
    "title": "Secure Direct Communication with a Quantum One-Time-Pad",
    "url": "https://arxiv.org/abs/quant-ph/0405177"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "a03a1046-e248-4605-adea-eba4f9743521",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}