Qualcomm Incorporated

Hongil Kim

Soo Bum Lee

Anand Palanigounder

Adrian Edward Escott

Gavin Bernard Horn

Karthika Paladugu

Methods, apparatuses, and computer-readable storage medium for encrypting discovery messages are provided. An example method at a first UE may include obtaining a discovery message that is ciphered based on at least one of a ciphering key, a ciphering algorithm, or a first set of time parameters, where the discovery message is scrambled based on at least one of a scrambling key, a scrambling algorithm, or a second set of time parameters. An example method may also include descrambling the discovery message based on at least one of the scrambling key, the scrambling algorithm, or the second set of time parameters. An example method may also include deciphering the discovery message based on at least one of the ciphering key, the ciphering algorithm, or the first set of time parameters.

Encrypting discovery messages

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive synchronization messages from a public cell that indicates synchronization information. The UE may input information received from the one or more synchronization messages into one or more functions provisioned at the UE to derive a set of control resources associated with a private cell. The UE may monitor the set of control resources to receive encrypted system information from the private cell. The UE may decrypt the system information of the private cell by deriving a cell specific broadcast key associated with the private cell. In some examples, the UE may derive the cell specific broadcast key based on the one or more functions provisioned at the UE. As such, the UE may transmit to the private cell via the set of control resources a random access message indicating successful decryption of the system information.

Cell access for hiding network presence and operation

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit, to a relay UE, a first message comprising a first freshness parameter, an identity of the UE, and authentication information, where the authentication information is used by a network node to authenticate the UE with security context information of the UE. The UE may derive a relay key for security establishment between the UE and the relay UE based on the first freshness parameter, a set of key generation parameters, and a shared key with the network node. The UE may derive a relay session key for security establishment between the UE and the relay UE based on the relay key, a first nonce of the UE, and a second nonce of the relay UE. Numerous other aspects are described.

PC5 link security setup using non-access stratum security context

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may register to a cellular network associated with a multicast/broadcast multimedia service (MBMS). The UE may transmit, to the cellular network, a request to join the MBMS. The UE may receive, from the cellular network and based at least in part on being registered with the cellular network, a response that indicates an MBMS service key (MSK) and MSK identifier pair. Numerous other aspects are described.

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San Diego, CA, United States of America

Hongil Kim