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The connectivity between data users data is efficiently shared using an attribute-based encryption (ABE) with different data access levels. The proposed ABE technique makes use of a trapdoor function to re-encrypt the data without the use of proxy re-encryption techniques. Experimental evaluation states that the proposed approach provides comparatively better results than the existing techniques.<\/jats:p>","DOI":"10.4018\/ijghpc.2020040101","type":"journal-article","created":{"date-parts":[[2020,2,21]],"date-time":"2020-02-21T10:42:51Z","timestamp":1582281771000},"page":"1-24","source":"Crossref","is-referenced-by-count":4,"title":["A Secure and Privacy-Preserving Approach to Protect User Data across Cloud based Online Social Networks"],"prefix":"10.4018","volume":"12","author":[{"family":"Neelu khare","sequence":"first","affiliation":[{"name":"Vellore Institute of Technology, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"family":"Kumaran U.","sequence":"additional","affiliation":[{"name":"Vellore Institute of Technology, India"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"2432","reference":[{"key":"IJGHPC.2020040101-0","doi-asserted-by":"publisher","DOI":"10.1007\/978-0-387-39940-9_135"},{"key":"IJGHPC.2020040101-1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jisa.2014.04.003"},{"key":"IJGHPC.2020040101-2","doi-asserted-by":"publisher","DOI":"10.1007\/978-3-642-19379-8_6"},{"key":"IJGHPC.2020040101-3","doi-asserted-by":"crossref","unstructured":"Benevenuto, F., Rodrigues, T., Cha, M., & Almeida, V. 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