{
  "annotation_id": "363bdaae-b2d1-460e-a1d9-63c2b790cb62",
  "date_created": "2026-03-02T18:02:07.104000Z",
  "date_modified": "2026-03-02T18:02:07.104000Z",
  "file_hash": "cff94cf5e3a445f127521f5fe3177e15067521a2fc77b09213640e8e3b6da119",
  "private": false,
  "record": {
    "abstract": "The capacity of the quantum dense key distribution (QDKD) [Phys. Rev. A69,\n032310 (2004)] is doubled by introducing the dense coding. The security of the\nimproved QDKD against eavesdropping is pointed out to be easily proven. In both\nthe original QDKD and the present improved QDKD, a strategy to double the\nefficiency of generating the secret key with given length is proposed. In\naddition, we point out a leak of security of the original QDKD and fix it.",
    "arxiv_id": "quant-ph/0403220",
    "authors": [
      "Z. J. Zhang",
      "Z. X. Man"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Improving quantum dense key distribution",
    "url": "https://arxiv.org/abs/quant-ph/0403220"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "873c0051-91d9-4607-9760-41dc8acf6626",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}