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method for transferring a security context during a handover, core network node, method for establishing a new security context during a handover, and user equipment
method for transferring a security context during a handover, core network node, method for establishing a new security context during a handover, and user equipment
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机译：切换期间传送安全上下文的方法，核心网络节点，切换期间建立新安全上下文的方法和用户设备
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摘要
the present invention relates to methods and apparatus for flexible, security context management during amf changes. one aspect of the invention is a mechanism for obtaining retroactive security during amf changes. instead of passing the current nas key to the target amf, the source amf derives a new nas key, provides the new nas key to the target amf, and sends a key change indication to the eu, either directly or through some another network node. the eu can then derive the new nas key from the old nas key. in some modalities, amf can provide a key generation parameter for u to use when deriving the new nas key. in other modalities, the target amf can change one or more security algorithms.
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