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Surv."],"published-print":{"date-parts":[[2026,4,30]]},"abstract":"<jats:p>Digital twin (DT) technology integrates Internet of Things (IoT), communication networks, and sensor systems through high-fidelity modeling and multi-dimensional simulation, enabling dynamic mapping and real-time optimization of physical objects. However, DT development still faces several challenges, including cross-platform interoperability limitations, excessive latency in real-time scenarios, security vulnerabilities in distributed deployments, and the complexity of accurately modeling multi-modal systems. Blockchain (BC) enhances the security and functional scope of DTs across diverse applications. This survey begins by introducing the core principles of BC and DT, and then investigates the rationale and benefits behind their integration. From a data-centric perspective, we explore how Blockchain-empowered Digital Twins (BCDTs) enhance data storage, secure exchange, privacy protection, and system interoperability. The survey further explores the architecture of BCDT systems, covering network topology, functional modules, platform design, and representative prototypes, offering insights into real-world applications. In addition, we survey how BCDT supports the convergence of key Industry 4.0 technologies, including the Internet of Things, vehicle networks, unmanned aerial systems, artificial intelligence, federated learning, 5G mobile networks, and software-defined networking. Industrial-grade quality BCDT-supported applications are highlighted, providing a solid foundation for further research. Finally, we analyze the challenges faced by BCDT and offer some optimistic suggestions for further research in the field of BCDT.<\/jats:p>","DOI":"10.1145\/3772366","type":"journal-article","created":{"date-parts":[[2025,10,22]],"date-time":"2025-10-22T10:50:11Z","timestamp":1761130211000},"page":"1-35","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":5,"title":["Blockchain in the Digital Twin Context: A Comprehensive Survey"],"prefix":"10.1145","volume":"58","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1986-7144","authenticated-orcid":false,"given":"Dun","family":"Li","sequence":"first","affiliation":[{"name":"College of Information Engineering, Shanghai Maritime University","place":["Shanghai, China"]},{"name":"Telecom SudParis, Institut Polytechnique de Paris","place":["Shanghai, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8861-5461","authenticated-orcid":false,"given":"Dezhi","family":"Han","sequence":"additional","affiliation":[{"name":"Shanghai Maritime University","place":["Shanghai, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2962-192X","authenticated-orcid":false,"given":"Noel","family":"Crespi","sequence":"additional","affiliation":[{"name":"Samovar, Telecom SudParis, Institut Polytechnique de Paris","place":["Palaiseau, France"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5441-9665","authenticated-orcid":false,"given":"Roberto","family":"Minerva","sequence":"additional","affiliation":[{"name":"Samovar, Telecom SudParis, Institut Polytechnique de Paris","place":["Palaiseau, France"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6327-1196","authenticated-orcid":false,"given":"Syed Mohsan","family":"Raza","sequence":"additional","affiliation":[{"name":"Samovar, Telecom SudParis, Institut Polytechnique de Paris","place":["Palaiseau, France"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3219-3700","authenticated-orcid":false,"given":"Reza","family":"Farahbakhsh","sequence":"additional","affiliation":[{"name":"Samovar, Telecom SudParis, Institut Polytechnique de Paris","place":["Palaiseau, France"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5074-1363","authenticated-orcid":false,"given":"Wei","family":"Liang","sequence":"additional","affiliation":[{"name":"College of Computer Science and Electronic Engineering, Hunan University","place":["Changsha, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7878-4330","authenticated-orcid":false,"given":"Zibin","family":"Zheng","sequence":"additional","affiliation":[{"name":"School of Software Engineering, Sun Yat-Sen University","place":["Zhuhai, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"320","published-online":{"date-parts":[[2025,12,19]]},"reference":[{"key":"e_1_3_2_2_2","doi-asserted-by":"publisher","DOI":"10.3390\/fi17010013"},{"key":"e_1_3_2_3_2","doi-asserted-by":"crossref","unstructured":"Sarthak Acharya Arif Ali Khan and Tero P\u00e4iv\u00e4rinta. 2024. 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