Netinfo Security ›› 2019, Vol. 19 ›› Issue (11): 14-23.doi: 10.3969/j.issn.1671-1122.2019.11.003

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A HIBE Scheme of Differentiates the Number of Identity Layers

Quanming LIU1,2, Jie FENG1(), Yinnan LI1, Shasha SU1,3   

  1. 1. School of Computer and Information Technology, Shanxi University, Taiyuan Shanxi 030006, China
    2. Shanxi Jinxin’an Technology Co.,Ltd. , Taiyuan Shanxi 030006, China;
    3. Inner Mongolia Power Group Mengdian Information &Telecommunication Co., Ltd. , Hohhot Inner Mongolia 010000, China;
  • Received:2019-09-16 Online:2019-11-10 Published:2020-05-11

Abstract:

In order to identify the internal attack threat of the encryption system, this paper divides the encryption process based on the hierarchical identity encryption structure into two cases: odd and even. By dividing the ciphertext into two forms, the system can distinguish the identity layer of the internal adversary. Decryption requires only one bilinear pair computation, which improves the decryption efficiency to a certain extent. The method of security proof is the double system encryption technology, which proves that the scheme is secure and anonymous under the adaptive ID model. Compared with the original scheme, the scheme uses fewer parameters and the encryption efficiency is improved. The scheme can resist the external attack, and can effectively identify the threat from the internal information leakage of the system, so that the security of the encryption scheme has been improved.

Key words: encryption system, hierarchical identity-based encryption, pairing computation, dual system encryption, adaptive ID model

CLC Number: