{
  "annotation_id": "4607c149-9a73-46e6-a4a5-145d7defdbda",
  "date_created": "2026-03-02T18:02:27.216000Z",
  "date_modified": "2026-03-02T18:02:27.216000Z",
  "file_hash": "9aca3fae867155322627c1ab561ab599b9b48da1738559d0908f19bbe5227616",
  "private": false,
  "record": {
    "abstract": "For single-photon quantum key generation between two users, it is shown that\nthe use of a shared secret key extended via a pseudo-random number generator\nmay simultaneously enhance the security and efficiency of the cryptosystem.\nThis effect arises from the intrinsic performance difference between quantum\ndetectors with versus without knowledge of the key, a purely quantum effect and\na new principle for key generation. No intrusion level estimation is needed and\nthe method is directly applicable to realistic systems with imperfections.\nQuantum direct encryption is also made possible by such use of a secret key.",
    "arxiv_id": "quant-ph/0603264",
    "authors": [
      "Horace P. Yuen"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Direct Use of Secret Key in Quantum Cryptography",
    "url": "https://arxiv.org/abs/quant-ph/0603264"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "01149d76-1754-460e-b5dc-2f4e0f212d4b",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}