关键词: 端到端加密, 基于身份信息加密算法（IBE）, 密钥管理

Abstract:

Key management is the core problem in the end-to-end encryption based on mobile communication system. Most existing schemes depend on KMC（Key Management Center）, and have problems of high cost in communication, low efficiency. A three-layer key management scheme is provided based on IBE（Identity Based Encryption）, which suits to mobile terminals. The master keys are produced and managed under the IBE mechanism, so the flow of key exchange is simplified and the dependency on the KMC is reduced. Communication data are encrypted in symmetric encryption algorithm to ensure the high efficiency. The two sides in the communication can do bidirectional authentication, have forward-security and defence of choose cipher attack.

Key words: end-to-end encryption, Identity Based Encryption（IBE）, key management