Secure identity-based encryption scheme without random oracles
标准模型下安全的基于身份的加密方案*

This paper proposed an efficient hierarchical identity-based encryption scheme. Based on the scheme and a strong one-time signature scheme,it presented a secure identity-based encryption scheme, which was proved to be secure under the decisional bilinear Diffie-Hellman assumption without random oracles. It is secure against adaptive chosen-ciphertext attacks.