Journal on Communications ›› 2022, Vol. 43 ›› Issue (5): 110-122.doi: 10.11959/j.issn.1000-436x.2022090

• Papers • Previous Articles     Next Articles

Lightweight searchable medical data sharing scheme

Xinchun YIN1,2, Mengyu WANG3,4, Jianting NING1   

  1. 1 College of Information Engineering, Yangzhou University, Yangzhou 225127, China
    2 Guangling College of Yangzhou University, Yangzhou 225128, China
    3 College of Computer and Cyber Security, Fujian Normal University, Fuzhou 350007, China
    4 State Key Laboratory of Information Security, Chinese Academy of Sciences, Beijing 100093, China
  • Revised:2022-03-19 Online:2022-05-25 Published:2022-05-01
  • Supported by:
    The National Natural Science Foundation of China(62032005);The National Natural Science Foundation of China(61972094);The Natural Science Foundation of Fujian Province(2020J02016)

Abstract:

The attribute-based encryption scheme supporting policy hiding and keyword search had a good application prospect in medical scenarios.However, most of the existing schemes did not support large attribute university or adopt the "AND gate" structure, which limited their scalability and flexibility of access control, and many schemes could not resist offline dictionary guessing attacks.In addition, attribute-based encryption involved a large number of bilinear pairing operations, which was inconvenient for user equipment with limited computing resources.A lightweight searchable medical data sharing scheme was proposed.Based on the support for keyword search and policy hiding, a large attribute university and a linear secret sharing structure were adopted to improve the scalability and flexibility of access control.The Intel SGX was used to re-encrypt data to achieve anti-offline dictionary guessing attack.The computational overhead of decryption was reduced to a constant level, which was suitable for user equipment with limited computing resources.Finally, it is proved that the proposed scheme has the security of selecting plaintext indistinguishable and can resist offline dictionary guessing attacks.

Key words: lightweight, policy hiding, keyword search, attribute-based encryption, large attribute university, offline dictionary guessing attack

CLC Number: 

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