{
  "annotation_id": "bf88cbe4-2ef1-464e-b553-2b7343488909",
  "date_created": "2026-03-02T18:02:23.830000Z",
  "date_modified": "2026-03-02T18:02:23.830000Z",
  "file_hash": "825e9db08f954501c36d2bab37c5c972eeb4377d0f3c76484cfb0587e1d900ea",
  "private": false,
  "record": {
    "abstract": "A quantum string seal encodes the value of a (bit) string as a quantum state\nin such a way that everyone can extract a non-negligible amount of available\ninformation on the string by a suitable measurement. Moreover, such measurement\nmust disturb the quantum state and is likely to be detected by an authorized\nverifier. In this way, the intactness of the encoded quantum state plays the\nrole of a wax seal in the digital world. Here I analyze the security of quantum\nstring seal by studying the information disturbance tradeoff of a measurement.\nThis information disturbance tradeoff analysis extends the earlier results of\nBechmann-Pasquinucci et al. and Chau by concluding that all quantum string\nseals are insecure. Specifically, I find a way to obtain non-trivial available\ninformation on the string that escapes the verifier\u0027s detection with at least\n50% chance.",
    "arxiv_id": "quant-ph/0602099",
    "authors": [
      "H. F. Chau"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.75.012327",
    "title": "Quantum String Seal Is Insecure",
    "url": "https://arxiv.org/abs/quant-ph/0602099"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "505c66e4-2b83-4352-a520-864a987faa7a",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}