Netinfo Security ›› 2020, Vol. 20 ›› Issue (6): 75-81.doi: 10.3969/j.issn.1671-1122.2020.06.009

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An Attribute-based Encryption Scheme for Cloud Storage Supporting Range Ciphertext Search

SHI Guofeng(), ZHANG Xinglan   

  1. Faculty of Computer Science, Department of Information, Beijing University of Technology, Beijing 100022, China
  • Received:2020-05-14 Online:2020-06-10 Published:2020-10-21
  • Contact: SHI Guofeng E-mail:shiguofeng@emails.bjut.edu.cn

Abstract:

As a flexible fine-grained access control scheme, attribute-based encryption provides a good solution to the security problems existing in cloud computing. But because the scale of data stored in the cloud is very large, how to retrieve the data needed by users while ensuring the security is worth studying. At present, most of the existing ciphertext search schemes do not support range search. This paper uses 0/1 encoding to construct a ciphertext search attribute-based encryption scheme based on online/offline strategy. 0/1 coding can transform the range domain problem into the set operation problem, and solve the problem that the range search cannot be carried out in the state of ciphertext. The analysis shows that the proposed scheme can achieve the range ciphertext search with less computation cost and keyword cost, and has computational efficiency and security in the range search.

Key words: attribute-based encryption, 0/1 encoding, ciphertext search, online/offline strategy

CLC Number: