关键词: 基于身份的数字签名, 理想功能, 通用可组合安全性

Abstract: A definition of universally composable security of identity-based signature schemes is proposed in the universally composable security framework. The equivalence of the universally composable security and the traditional security of identity-based signature schemes is proved. This result shows that an identity-based signature scheme can be used as a primitive block to design more complicated cryptographic protocols.

Key words: identity-based signature, ideal functionality, universally composable security