Generic Construction of Certificate-based Encryption Scheme in the Standard Model
Xiao Jun-mo · 2009
The certificate-based encryption(CBE) is a new PKC paradigm which combines public-key encryption(PKE) and identity based encryption(IBE) while preserving their features.CBE provides an efficient implicit certification mechanism for a PKI and allows a form of automatic certificate revocation,while it is not subjected to the private key escrow problem and secret key distribution problem inherent in IBE.This paper firstly proposed a generic construction of CBE scheme based on three general primitives:IBE,PKE and strong one-time signature(SOTS) scheme and proved it to be secure in the standard model.Then,it described how to use message authentication code(MAC) to replace the SOTS scheme to further improve the efficient of the first generic CBE scheme and to achieve another generic CBE scheme.These two generic constructions show that CBE scheme can be constructed in a more general and efficient way.