JISE


  [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18]


Journal of Information Science and Engineering, Vol. 24 No. 4, pp. 1143-1157


Identity-Based Parallel Key-Insulated Signature Without Random Oracles

Jian Weng1,2, Xiang-Xue Li3, Ke-Fei Chen2 and Sheng-Li Liu2
1Department of Computer Science 
Jinan University 
Guangzhou 510632, P.R. China 
2Department of Computer Science and Engineering 
3School of Information Security Engineering 
Shanghai Jiao Tong University 
Shanghai 200240, P.R. China

    We extend Hanaoka et al.’s parallel key-insulated mechanism to identity-based signature scenarios, and propose an identity-based parallel key-insulated signature scheme. The proposed scheme enjoys several attractive features: (i) it is provably secure without random oracles; (ii) it is strong key-insulated, and even if one of a user’s helper key and some of his temporary secret keys are exposed, it is still impossible for an adversary to derive all of this user’s temporary secret keys; (iii) it allows frequent key-updates without increasing the risk of helper key-exposure, and thus enhances the security of the system.

Keywords: parallel key-insulated, identity-based signature, key-exposure, random oracle model, bilinear paring

  Retrieve PDF document (JISE_200804_09.pdf)