The embodiment of this application provides a variety of methods, devices and communication systems for obtaining keys. The communication key used between the target AMF entity and the terminal device is determined by the intermediate key sent by the source AMF entity by the target AMF entity, or the target AMF entity requests a new key from the authentication functional entity to determine the communication key used between the target AMF entity and the terminal device, and notifies the end. The end device deduces the corresponding key, realizes the key isolation between the target AMF entity and the source AMF entity, thus effectively avoiding the security risks in the existing technology and improving the network security.
【技术实现步骤摘要】
【国外来华专利技术】PCT国内申请,说明书已公开。
【技术保护点】
PCT国内申请,权利要求书已公开。
【技术特征摘要】
【国外来华专利技术】PCT国内申请,...
【专利技术属性】
技术研发人员:陈璟,潘凯,李赫,
申请(专利权)人:华为技术有限公司,
类型:发明
国别省市:广东,44
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