Extending Fuzzy Identity-Based Encryption with Delegating Capabilities
We propose an efficient and provably secure Fuzzy Identity-Based Encryption scheme with delegating capabilities, where the delegation algorithm allows an identity to generate private keys for some other identities. Compared to the Sahai-Waters Large Universe construction, our scheme supports arbitrary strings as attributes and identities can consist of variable numbers of attributes. Besides, our scheme is more efficient by using a hash function modeled as a random oracle. And we give the security proof of our scheme in the Fuzzy Selective ID model under the Dccisional Bilinear Diffie-Hellman assumption in the random oracle.
Fuzzy IBE Delegation Bilinear maps Random oracle
Shenglong Ding Yiming Zhao Han Zhu
Software School Fudan University Shanghai, China
国际会议
重庆
英文
19-23
2011-08-20（万方平台首次上网日期，不代表论文的发表时间）