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Users can change their slices as their preferences or requirements vary over time. However, existing handover-authentication mechanisms cannot support inter-slice handover because of the fine-grained demand among network slice services, which could cause challenging issues, such as the compromise of service quality, anonymity, and universality. In this paper, we address these issues by introducing a fast and universal inter-slice (FUIS) handover authentication framework based on blockchain, chameleon hash, and ring signature. To address these issues, we introduce an anonymous service-oriented authentication protocol with a key agreement for inter-slice handover by constructing an anonymous ticket with the trapdoor collision property of chameleon hash functions. In order to reduce the computation overhead of the user side in the process of authentication, a privacy-preserving ticket validation with a ring signature is designed to finish in the consensus phase of the blockchain in advance. Thanks to the edge computing capabilities in 5G, distributed edge nodes help to store the anonymous ticket information, which guarantees that the legal users can finish authentication swiftly during handover. Our scheme's performance is evaluated through simulation experiments to testify the efficiency and feasibility in a 5G network-sliced environment. The results show that compared to other authentication schemes of the same type, the overall inter-slice handover delay has been reduced by 97.94%.<\/jats:p>","DOI":"10.1155\/2021\/6694058","type":"journal-article","created":{"date-parts":[[2021,2,1]],"date-time":"2021-02-01T02:16:25Z","timestamp":1612145785000},"page":"1-19","source":"Crossref","is-referenced-by-count":10,"title":["Fast and Universal Inter-Slice Handover Authentication with Privacy Protection in 5G Network"],"prefix":"10.1155","volume":"2021","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9938-5320","authenticated-orcid":true,"given":"Zhe","family":"Ren","sequence":"first","affiliation":[{"name":"State Key Laboratory of Integrated Services Networks, and the School of Cyber Engineering, Xidian University, Xi\u2019an 710126, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5583-4155","authenticated-orcid":true,"given":"Xinghua","family":"Li","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Integrated Services Networks, and the School of Cyber Engineering, Xidian University, Xi\u2019an 710126, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qi","family":"Jiang","sequence":"additional","affiliation":[{"name":"Network Communication Research Centre, Peng Cheng Laboratory, Shenzhen 518055, China"},{"name":"Guangxi Key Laboratory of Trusted Software, Guilin University of Electronic Technology, Guilin 541004, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6149-4807","authenticated-orcid":true,"given":"Qingfeng","family":"Cheng","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Mathematical Engineering and Advanced Computing, Strategic Support Force Information Engineering University, Zhengzhou 450001, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jianfeng","family":"Ma","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Integrated Services Networks, and the School of Cyber Engineering, Xidian University, Xi\u2019an 710126, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","reference":[{"key":"1","doi-asserted-by":"publisher","DOI":"10.1109\/mcom.2017.1600951"},{"key":"2","doi-asserted-by":"publisher","DOI":"10.1109\/mic.2017.3481355"},{"key":"3","doi-asserted-by":"publisher","DOI":"10.1109\/mcom.2017.1600940"},{"key":"4","author":"K. 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