UE DISCOVERY MESSAGE PROTECTION METHOD AND APPARATUS, COMMUNICATION DEVICE, AND STORAGE MEDIUM

Abstract: a method, communication device, and a storage medium for protecting user equipment (ue) discovery messages. the ue discovery messages are protected by sending a first announcement message in response to determining that the first ue is located outside a network coverage range, where the first announcement message includes: a discovery message encrypted based on a discovery key, and ltk identifier information (id) indicating an ltk, where the discovery key is determined based on the ltk received in response to determining that the first ue is located within the network coverage range, and the ltk id is used for allowing a second ue to determine a key request to request the discovery key or request to generate an intermediate key of the discovery key.

Inventor(s): Haoran LIANG, Wei LU

CPC Classification: H04L9/088 ({Usage controlling of secret information, e.g. techniques for restricting cryptographic keys to pre-authorized uses, different access levels, validity of crypto-period, different key- or password length, or different strong and weak cryptographic algorithms (network architectures or network communication protocols for using time-dependent keys in a packet data network )})

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