Abstract: An electronic device includes a display panel and a viewing angle control unit. The viewing angle control unit includes a first substrate; a second substrate; a first protrusion disposed between the first substrate and the second substrate; and a first shielding unit disposed between the first substrate and the second substrate and overlapped with the first protrusion, wherein the first shielding unit and the first protrusion respectively form a first projection and a second projection on the first substrate, the first and second projections respectively have a first maximum length (A) and a second maximum length (B) in a first direction satisfying the following formula (I), and the first and second projections respectively have a first maximum width (B) and a second maximum width (b) in a second direction satisfying the following formula (II): 2 ? A / a ? 1 ( I ) 2 ? B / b ? 1.

Abstract: An electronic device includes a display panel and a viewing angle control unit disposed opposite to the display panel. The viewing angle control unit includes a first substrate; a second substrate disposed opposite to the first substrate; and a plurality of protrusions disposed between the first substrate and the second substrate, wherein a transmittance of the plurality of protrusions is between about 0.006% and about 1.6%.

Abstract: In a communication method, when MAC addresses in a plurality of VSI messages conflict, in response to only some of the VSI messages, a VSI message receiving end sends an action response message carrying a conflicting MAC address. In this way, a device that can correctly decrypt the action response message can decrypt, for a few times, ciphertext information in received action-request messages using a key of the device.

Abstract: An electronic device includes a display panel and a viewing angle control unit disposed opposite to the display panel. The viewing angle control unit includes a first substrate; a second substrate disposed opposite to the first substrate; and a plurality of protrusions disposed between the first substrate and the second substrate, wherein a transmittance of the plurality of protrusions is between about 0.006% and about 1.6%.

Abstract: A service application programming interface (API) invoking method where a security method applied to an API exposing function entity is updated from an original security method to a new security method, and where the security method of the API exposing function entity is used for communication between the API exposing function entity and an invoker. The method includes: obtaining, by the invoker, a new security method of the API exposing function entity; and sending, by the invoker, a first invoking request to the API exposing function entity using the new security method, where the first invoking request includes a name of a service API, and where the first invoking request is used to invoke the service API.

Abstract: In a communication method, when MAC addresses in a plurality of VSI messages conflict, in response to only some of the VSI messages, a VSI message receiving end sends an action response message carrying a conflicting MAC address. In this way, a device that can correctly decrypt the action response message can decrypt, for a few times, ciphertext information in received action-request messages using a key of the device.

Abstract: An electronic device includes a display panel and a viewing angle control unit disposed opposite to the display panel. The viewing angle control unit includes a first substrate; a second substrate disposed opposite to the first substrate; a plurality of protrusions disposed between the first substrate and the second substrate; and a plurality of shielding units disposed between the first substrate and the second substrate and disposed corresponding to the plurality of protrusions. One of the shielding units forms a first projection on the first substrate, one of the protrusions forms a second projection on the first substrate, and the second projection falls within the first projection.

Abstract: A key generation method includes determining, by an access and mobility management function node, key-related information. The method also includes sending, by the access and mobility management function node, a redirection request message to a mobility management entity. The redirection request message includes the key-related information, and the redirection request message is used to request to hand over a voice service from a packet switched (PS) domain to a circuit switched (CS) domain. The method further includes receiving, by the mobility management entity, the redirection request message. The method additionally includes generating, by the mobility management entity, an encryption key and an integrity protection key for the voice service based on the key-related information.

Abstract: The present disclosure relates to a pharmaceutical composition. Specifically, a pharmaceutical composition of abiraterone acetate is provided, wherein a 300 mg dose of abiraterone acetate is bioequivalent to a 1000 mg dose of Zytiga® in healthy male subjects in a fasting state.

Abstract: A data transmission method and apparatus are provided. When the data transmission method is applied to a first device, the method includes: when a fresh value corresponding to a message to be sent by the first device is a first fresh value, updating an encryption key from a first key to a second key, and generating a first keystream based on the first fresh value and the second key; encrypting first data based on the first keystream, to obtain the encrypted first data; generating a first message based on the encrypted first data and the first fresh value; and sending the first message to a second device.

Abstract: A key generation method includes determining, by an access and mobility management function node, key-related information. The method also includes sending, by the access and mobility management function node, a redirection request message to a mobility management entity. The redirection request message includes the key-related information, and the redirection request message is used to request to hand over a voice service from a packet switched (PS) domain to a circuit switched (CS) domain. The method further includes receiving, by the mobility management entity, the redirection request message. The method additionally includes generating, by the mobility management entity, an encryption key and an integrity protection key for the voice service based on the key-related information.

Abstract: This application provides a method for restricting access of a terminal device, and an apparatus. The method includes: receiving, by an access network device, a first identifier that is from a terminal device, where the first identifier is used to identify the terminal device; and if the first identifier matches a second identifier, restricting, by the access network device, access of the terminal device, where the second identifier is used to identify a terminal device having abnormal behavior. Based on the solution, the access network device pre-records the second identifier of the terminal device having the abnormal behavior.

Abstract: A vehicle certificate application method implemented by a vehicle-mounted device includes sending a certificate proxy application message to a roadside unit RSU in response to determining that the Uu interface of the vehicle-mounted device is unavailable or the signal quality of the Uu interface is lower than the threshold. The certificate proxy application message includes certificate application information of a vehicle to which the vehicle-mounted device is mounted. The certificate application information is forwarded by the RSU to a third-party authority. The vehicle-mounted device receives, from the RSU, a certificate proxy application response that includes an identity certificate of the vehicle generated by the third-party authority based on the certificate application information.

Abstract: A method for security handling in a mobility of a terminal device, where the method includes: a target access and mobility management function (AMF) entity receiving a first message for registering a terminal device; the target AMF entity sending a second message to a source AMF entity after receiving the first message; the source AMF entity deriving a first key based on a key between the source AMF entity and the terminal device; the source AMF entity sending the first key to the target AMF entity; the target AMF entity determining to use the first key based on security related information after receiving the first key; and the target AMF entity determining a communication key between the target AMF entity and the terminal device based on the first key after determining to use the first key.

Abstract: A method includes receiving, by a mobility management entity (MME), a redirection request message from an access and mobility management function (AMF) node, where the redirection request message includes key-related information. The method also includes generating, by the MME, an encryption key and an integrity protection key based on the key-related information. The redirection request message is used to request to hand over a voice service from a packet switched (PS) domain to a circuit switched (CS) domain.

Abstract: A message protection method and an apparatus are disclosed. The method includes: When a terminal prepares to hand over from a first-standard system to a second-standard system, the terminal may not have a security context of the second-standard system after handover. Therefore, in the method of the present disclosure, the terminal performs integrity protection on a registration request message and a location update request message by using an integrity key in a security context of the first-standard system before handover. Both the registration request message and the location update request message are messages for triggering handover. Therefore, in the method, security protection is implemented on the message for triggering handover, thereby helping improve communication security.

Abstract: This application provides a user authentication method and an apparatus. Before establishing, for a terminal device, a session used to transmit service data, an SMF entity receives a session establishment request message; determines, based on the session establishment request message, to perform user authentication on a user using the terminal device; and sends a session establishment message to a UPF entity, where the session establishment message is used to establish a first session for the terminal device, and a session attribute of the first session is: a session used to transmit only a user authentication message. Subsequently, the terminal device and an AAA server transmit the user authentication message through the first session, to complete user authentication.

Abstract: The present disclosure provides example terminal devices, road side units, and servers. One example terminal device performs operations including sending certificate request information to a certificate authority server, where the certificate request information includes identity information of the terminal device. A communication key sent by the certificate authority server is received by the terminal device. Encrypted information that is sent by a road side unit is received by the terminal device, where the encrypted information is information encrypted by using the communication key. The encrypted broadcast information is decrypted by the terminal device by using the communication key.

Abstract: An example terminal device includes at least one processor and at least one memory coupled to the at least one processor and storing programming instructions for execution by the at least one processor to send a certificate application parameter to an interface adaptation function entity; and receive a certificate from the interface adaptation function entity, wherein the certificate is configured by a target certificate management function entity for the terminal device.

Abstract: A certificate revocation list updating method includes determining by a first road side unit (RSU), based on a first certificate revocation list stored by the first RSU, that a certificate used by a first on board unit (OBU) in a coverage area of the first RSU is revoked, sending, by the first RSU, a first notification message to one or more OBUs in the coverage area of the first RSU, where the first notification message notifies the one or more OBUs to update a certificate revocation list.