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Web"],"published-print":{"date-parts":[[2026,2,28]]},"abstract":"<jats:p>Efficient and privacy-preserving medical data sharing remains a key challenge in the era of digital healthcare. Existing schemes often suffer from limited access control, substantial computational overhead, and reliance on trusted third parties. This article proposes a revocable Attribute-Based Searchable Encryption (ABSE) scheme built upon a hierarchical blockchain architecture, which enables a secure keyword search over encrypted data via expressive attribute-based access policies, and a revocation mechanism is integrated to support dynamic user management. We design a lightweight and privacy-preserving computation framework that offloads expensive cryptographic operations to the cloud, thereby reducing the burden on user-side devices. Furthermore, we propose a lightweight consensus protocol, termed lottery consensus, which replaces traditional proof-of-work hash computations with meaningful operations that are tied to the ABSE-based data-sharing process. Extensive theoretical analysis and simulation experiments demonstrate the superior efficiency of the proposed scheme, and formal security proofs demonstrate its robustness against threats.<\/jats:p>","DOI":"10.1145\/3771992","type":"journal-article","created":{"date-parts":[[2025,10,15]],"date-time":"2025-10-15T10:14:41Z","timestamp":1760523281000},"page":"1-29","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":2,"title":["A Blockchain-Assisted Revocable and Efficient ABSE Scheme for Secure Medical Data Sharing"],"prefix":"10.1145","volume":"20","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9133-5572","authenticated-orcid":false,"given":"Gao","family":"Hancheng","sequence":"first","affiliation":[{"name":"Nanjing University of Posts and Telecommunications School of Computer Science","place":["Nanjing, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0003-1430-5454","authenticated-orcid":false,"given":"Wu","family":"Xiaoyu","sequence":"additional","affiliation":[{"name":"Nanjing University of Posts and Telecommunications School of Computer Science","place":["Nanjing, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4392-3599","authenticated-orcid":false,"given":"Haiping","family":"Huang","sequence":"additional","affiliation":[{"name":"Nanjing University of Posts and Telecommunications School of Computer Science","place":["Nanjing, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7280-7378","authenticated-orcid":false,"given":"Li","family":"Qi","sequence":"additional","affiliation":[{"name":"Nanjing University of Posts and Telecommunications School of Computer Science","place":["Nanjing, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0008-4440-8127","authenticated-orcid":false,"given":"Xing","family":"Yizheng","sequence":"additional","affiliation":[{"name":"Nanjing University of Posts and Telecommunications School of Computer Science","place":["Nanjing, China"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"320","published-online":{"date-parts":[[2026,2,18]]},"reference":[{"key":"e_1_3_1_2_2","doi-asserted-by":"publisher","DOI":"10.1109\/SP.2007.11"},{"key":"e_1_3_1_3_2","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-540-24676-3_30"},{"key":"e_1_3_1_4_2","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-540-70936-7_28"},{"key":"e_1_3_1_5_2","doi-asserted-by":"publisher","DOI":"10.1109\/JIOT.2024.3484227"},{"key":"e_1_3_1_6_2","doi-asserted-by":"publisher","DOI":"10.1109\/TCE.2024.3357115"},{"key":"e_1_3_1_7_2","doi-asserted-by":"publisher","DOI":"10.1109\/TCCN.2024.3454280"},{"key":"e_1_3_1_8_2","doi-asserted-by":"publisher","DOI":"10.1109\/TDSC.2023.3265932"},{"key":"e_1_3_1_9_2","doi-asserted-by":"publisher","DOI":"10.1109\/JIOT.2025.3529480"},{"key":"e_1_3_1_10_2","doi-asserted-by":"publisher","DOI":"10.56021\/9781421407944"},{"key":"e_1_3_1_11_2","doi-asserted-by":"publisher","DOI":"10.1145\/1180405.1180418"},{"key":"e_1_3_1_12_2","volume-title":"Proceedings of the 20th USENIX Security Symposium (USENIX Security 11)","author":"Green Matthew","year":"2011","unstructured":"Matthew Green, Susan Hohenberger, and Brent Waters. 2011. 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