15-09-2022 дата публикации
Номер: US20220295271A9
Принадлежит:
An anchor key generation method, device, and system, where the method includes generating, by a unified data management network element (UDM), an intermediate key based on a cipher key (CK), an integrity key (IK), and indication information regarding an operator; sending, by the UDM, the intermediate key to an authentication server function (AUSF); receiving, by the AUSF, the intermediate key; generating, by the AUSF, an anchor key based on the intermediate key; sending, by the AUSF, the anchor key to a security anchor function (SEAF); and generating, by the SEAF, a key (Kamf) based on the anchor key, where the Kamf is used to derive a 3Generation Partnership Project (3GPP) key. 1. A method implemented in a communication system , comprising:generating, by a user equipment, an intermediate key based on a cipher key (CK), an integrity key (IK), and an operator type identifier comprising a service network (SN) identifier;generating, by the user equipment, an anchor key based on the intermediate key, wherein the anchor key is to implement compatibility with various access modes;generating, by the user equipment, a key (Kamf) based on the anchor key;deriving, by the user equipment, a base station key based on the Kamf; andderiving, by the user equipment based on the base station key, a user plane cipher key, a user plane integrity key, a control plane cipher key, and a control plane integrity key.2. The method according to claim 1 , wherein generating claim 1 , by the user equipment claim 1 , the anchor key based on the intermediate key comprises:generating, by the user equipment, an extended master session key (EMSK′) based on the intermediate key;{'sub': 'left', 'generating, by the user equipment, a key (K) by truncating a bit of the EMSK′; and'}{'sub': 'left', 'obtaining, by the user equipment, the anchor key based on the Kand the SN identifier.'}3. The method according to claim 1 , further comprising deriving claim 1 , by the user equipment claim 1 , a non-access ...
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