{
  "annotation_id": "d6ed7022-5de2-4445-9ed6-23a482204fa8",
  "date_created": "2026-03-02T18:02:03.604000Z",
  "date_modified": "2026-03-02T18:02:03.604000Z",
  "file_hash": "8df1378cea23db45007af57e9e068b9033fd1dc26ca0097a1b8ed574435fed82",
  "private": false,
  "record": {
    "abstract": "We presen a secure direct communication protocol by using step-split\nEinstein-Podolsky-Rosen (EPR) pair. In this communication protocol, Alice first\nsends one qubit of an EPR pair to Bob. Bob sends a receipt signal to Alice\nthrough public channel when he receives Alice\u0027s first qubit. Alice performs her\nencoding operations on the second qubit and sends this qubit to Bob. Bob\nperforms a Bell-basis measurement to draw Alice\u0027s information. The security of\nthis protocol is based on `High fidelity implies low entropy\u0027. If Eve want to\neavesdrop Alice\u0027s information, she has to attack both qubits of the EPR pair,\nwhich results in that any effective eavesdropping attack can be detected. Bob\u0027s\nreceipt signal can protect this protocol against the eavesdropping hiding in\nthe quantum channel losses. And this protocol is strictly secure to perform a\nquantum key distribution by using Calderbank-Shor-Steane codes.",
    "arxiv_id": "quant-ph/0311055",
    "authors": [
      "Qing-yu Cai"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Secure direct communication using step-split Einstein-Podolsky-Rosen   pair",
    "url": "https://arxiv.org/abs/quant-ph/0311055"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "f21e3f7a-3f4c-4acc-b119-8d52c50d06c7",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}