Identity-Based Encryption based on DHIES
Most traditional public key cryptosystems are constructed upon al gebraically rich structures, which makes their key pairs combin able, i.e., the combination of some private keys and their corre sponding public keys could form a new key pair. Exploring such combinable property, this paper proposes a novel Identity-Based Encryption (IBE) scheme based on the Diffie-Hellman Integrated Encryption Scheme (DHIES) with quadratic key combination struc ture from bilinear maps. The new scheme has a number of advan tages over other IBE schemes. First, it uses DHIES to fulfill en cryption, thus naturally obtains the security against adaptive chosen ciphertext attack from DHIES. Second, it is interoperable with ex isting security systems based on DHIES. Third, compared to many pairing-based IBE schemes, it only requires pairing computation during public key generation and there is no need for special hash function. We prove that our scheme is selective identity chosen ciphertext secure in the random oracle model assuming DHIES is chosen ciphertext secure. Additionally, the extract algorithm of our scheme also implies an identity-based short signature scheme.
identity-based encryption DHIES combination bilinear map
Yu Chen Manuel Charlemagne Zhi Guan Jianbin Hu Zhong Chen
School of EECS Peking University, China School of Computing Dublin City University, Ireland
国际会议
北京
英文
82-88
2010-04-13（万方平台首次上网日期，不代表论文的发表时间）