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Moreover, this article focuses on the privacy protection of the ciphertext strategy in the CP-ABE scheme, and protects the privacy information of the access strategy by designing appropriate ciphertext and key structures and access structure forms. In addition, the system efficiency is improved by computing outsourcing, and solutions to problems in outsourcing computing are proposed. Meanwhile, two efficient and flexible support policy hidden multi-authorization center access control schemes are constructed. Finally, this study analyzes the performance of the model through controlled experiments. The research results show that this scheme has excellent performance.<\/jats:p>","DOI":"10.3233\/jifs-189318","type":"journal-article","created":{"date-parts":[[2020,9,18]],"date-time":"2020-09-18T12:50:03Z","timestamp":1600433403000},"page":"2193-2203","source":"Crossref","is-referenced-by-count":19,"title":["Data security sharing method based on CP-ABE and blockchain"],"prefix":"10.1177","volume":"40","author":[{"given":"Zhijun","family":"Zhang","sequence":"first","affiliation":[{"name":"Blockchain Laboratory of Agricultural Vegetables, Weifang University of Science and Technology, Shouguang, China"}]},{"given":"Xiaojun","family":"Ren","sequence":"additional","affiliation":[{"name":"Blockchain Laboratory of Agricultural Vegetables, Weifang University of Science and Technology, Shouguang, China"}]}],"member":"179","reference":[{"issue":"6-10","key":"10.3233\/JIFS-189318_ref1","first-page":"71","article-title":"Blockchain technology: Beyond 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