{
  "id": "quant-ph/0508171",
  "version": "v1",
  "published": "2005-08-23T13:00:51.000Z",
  "updated": "2005-08-23T13:00:51.000Z",
  "title": "Addendum to \"Quantum secret sharing between multiparty and multiparty without entanglement\"",
  "authors": [
    "Fu-Guo Deng",
    "Feng-Li Yan",
    "Xi-Han Li",
    "Chun-Yan Li",
    "Hong-Yu Zhou",
    "Ting Gao"
  ],
  "comment": "4 pages, 1 figure",
  "categories": [
    "quant-ph"
  ],
  "abstract": "Recently, Yan and Gao proposed a quantum secret sharing protocol between multiparty ($m$ members in group 1) and multiparty ($n$ members in group 2) using a sequence of single photons (Phys. Rev. A \\textbf{72}, 012304 (2005)). We find that it is secure if the quantum signal transmitted is only a single photon but insecure with a multi-photon signal as some agents can get the information about the others' message if they attack the communication with a Trojan horse. However, security against this attack can be attained with a simple modification.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2005-08-23T13:00:51.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "multiparty",
      "entanglement",
      "single photon",
      "quantum secret sharing protocol",
      "simple modification"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2005quant.ph..8171D"
    }
  }
}