{
  "abstract": "Acquiring the channel state information (CSI) of passive eavesdroppers remains a fundamental challenge in physical layer security. The sensing capability of integrated sensing and communication (ISAC) systems enables estimation of a potential eavesdropper's angle of departure (AoD) before secure transmission. Accordingly, a sensing-aided secure multicast scheme is proposed using a rotatable antenna (RA) architecture that combines array-level and element-level rotations with analog beamforming. The scheme comprises eavesdropper sensing and secure communication stages. In the sensing stage, the maximum likelihood estimator (MLE) and corresponding Cramer--Rao bound (CRB) are derived for eavesdropper AoD estimation. The two rotation levels are then optimized through cyclic coordinate search to minimize the worst-case CRB. The resulting AoD estimate and CRB determine the center and width of the angular uncertainty region, respectively. In the communication stage, the constant-modulus analog beamformer and RA configuration are jointly optimized to maximize the worst-case secrecy rate over this region. After angular discretization and smooth approximation, the resulting problem is solved using a product-space joint optimization framework. Numerical simulation results validate the convergence and effectiveness of the proposed algorithms. It is demonstrated that i) the proposed RA-enabled sensing design effectively improves the eavesdropper AoD estimation accuracy; ii) a high and nearly constant secrecy rate is maintained over the uncertainty region; and iii) the joint optimization of the two rotation levels yields lower CRBs and higher secrecy rates than schemes employing either a fixed-position array or a single rotation level.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2605.08718",
  "author_total": 7,
  "authors": [
    {
      "name": "Zequan Wang"
    },
    {
      "name": "Liang Yin"
    },
    {
      "name": "Chongjun Ouyang"
    },
    {
      "name": "Hao Xu"
    },
    {
      "name": "Yunan Sun"
    },
    {
      "name": "Yitong Liu"
    },
    {
      "name": "Hongwen Yang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/3vety3exx5kz5.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2605.08718",
  "fulltext_url": null,
  "id": "3vety3exx5kz5",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2605.08718",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cs.IT"
    ],
    [
      "arxiv",
      "eess.SP"
    ],
    [
      "arxiv",
      "math.IT"
    ],
    [
      "openalex",
      "2208|Wireless Communication Security Techniques"
    ]
  ],
  "openalex": "W7160902806",
  "pdf_url": "https://arxiv.org/pdf/2605.08718",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-13",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/3vety3exx5kz5.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:21:29Z",
      "native_id": "2605.08718",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2605.08718"
    }
  ],
  "subjects": [
    {
      "field": "mathematics",
      "origin": "arxiv:math.IT",
      "subfield": "general"
    }
  ],
  "title": "Sensing-Aided Secure Multicast in Rotatable Antenna-Enabled ISAC Systems",
  "title_text": "Sensing-Aided Secure Multicast in Rotatable Antenna-Enabled ISAC Systems",
  "type": "preprint",
  "updated_at": "2026-10-30T12:21:29Z",
  "url": "https://research.draconitic.com/paper/3vety3exx5kz5",
  "venue": "arXiv",
  "versions": []
}