Abstract: Provided is an adjustable optical assembly (900), including a bearing base (921), a driving mechanism (910), a zoom optical assembly (200), and a compensating optical assembly (300). The driving mechanism (910) includes: a bracket (911) having a bottom end connected to the bearing base (921) and a top end having a top groove (911a) open upwards; guide rods (912, 913) supported on the top groove (911a), the guide rods (912, 913) coinciding with the direction of optical axes of the zoom optical assembly (200) and the compensating optical assembly (300); a zoom bearer (914); a compensating bearer (915); a zoom driving assembly; and a compensating driving assembly. The zoom bearer (914) and the compensating bearer (915) are both mounted on the guide rods (912, 913) and slidable along the guide rods (912, 913). Also provided are a corresponding periscopic optical zoom module and an assembly method therefor.

Abstract: A security authentication method and device are provided. The method includes performing, based on a transmitted password authentication message, password authentication with a server and acquiring a result of the password authentication; sending a request authentication message to the server in a case that the result of the password authentication is determined to indicate that the password authentication is successful; performing security authentication through digitally signing by the server all intercommunicated messages and verifying the digital signature by the client, or through encrypting a local random number and all intercommunicated messages by the client using a public key and verifying a random number returned by the server.

Abstract: Disclosed in the embodiments of the present disclosure are an information processing method and a related network device. The method comprises: the network device receiving a first message which is sent by an access and mobility management function (AMF) and is used for slice authentication, the first message comprising a first slice identification, a first slice user identification and a first card user identification; determining a first pseudo code corresponding to the first slice identification and a first address of an authentication server, and generating a second message comprising the first pseudo code, the first slice user identification and the first card user identification; and sending the second message to the authentication server on the basis of the first address.

Abstract: The embodiment of the present application provides a key generation method, which relates to a terminal device, a network device and a computer-readable storage medium, wherein the method includes: determining a first key based on the long-term key; generating the session key based on the first key and at least one additional key, communicating with the network side based on the session key; wherein, the at least one additional key includes: an initial session key generated when the terminal device is connected to the network for the first time, and/or a session key used in the last communication; the first key and the at least one additional key are both symmetric keys.

Abstract: A security authentication method and device are provided. The method includes performing, based on a transmitted password authentication message, password authentication with a server and acquiring a result of the password authentication; sending a request authentication message to the server in a case that the result of the password authentication is determined to indicate that the password authentication is successful; performing security authentication through digitally signing by the server all intercommunicated messages and verifying the digital signature by the client, or through encrypting a local random number and all intercommunicated messages by the client using a public key and verifying a random number returned by the server.

Abstract: The invention relates to a method of authentication and session key agreement for secure data transmission between a first and second data communication entity in an electronic data transmission system. Furthermore, the invention relates to an electronic transmission system to perform a method of authentication and session key agreement.

Abstract: The invention relates to a method of authentication and session key agreement for secure data transmission between a first and second data communication entity in an electronic data transmission system. Furthermore, the invention relates to an electronic transmission system to perform a method of authentication and session key agreement.

Abstract: The invention relates to a method for changing a group key GK for a secure data exchange in a group of network elements P1 . . . Pn (n=2, 3, . . . ) in a network system having a closed peer-to-peer configuration and a virtual synchronism supporting group communication protocol in a communication layer of a system architecture of the network system, wherein in the case of a change in a composition of the group of network elements P1 . . . Pn, caused by the join of a new network element Pn+1 into the group of network elements P1 . . . Pn or by the leave of a network element Pv (1?v?n) from the group of network elements P1 . . . Pn, a group key renewal, in which a network element Pi* (1?i?n) selected from the group of network elements P1 . . . Pn generates a new group key GKneu, is carried out and the new group key GKneu is transferred from the selected network element Pi to all the remaining network elements Pk (1?k?n, k?i) of the group of network elements P1 . . .

Abstract: A method for encrypting video data in which the encryption achieves a high standard of security and is carried out at a reduced computation cost. The encryption comprises disordering a set of video data to be encrypted and obscuring the disordered video data.

Abstract: A method for encrypting video data in which the encryption achieves a high standard of security and is carried out at a reduced computation cost. The encryption comprises disordering a set of video data to be encrypted and obscuring the disordered video data.

Abstract: The invention relates to a method for changing a group key GK for a secure data exchange in a group of network elements P1 . . . Pn (n=2, 3, . . . ) in a network system having a closed peer-to-peer configuration and a virtual synchronism supporting group communication protocol in a communication layer of a system architecture of the network system, wherein in the case of a change in a composition of the group of network elements P1 . . . Pn, caused by the join of a new network element Pn+1 into the group of network elements P1 . . . Pn or by the leave of a network element Pv (1?v?n) from the group of network elements P1 . . . Pn, a group key renewal, in which a network element Pi* (1?i?n) selected from the group of network elements P1 . . . Pn generates a new group key GKneu, is carried out and the new group key GKneu is transferred from the selected network element Pi to all the remaining network elements Pk (1?k?n+1, 1?k?n, k?i, k?v) of the group of network elements P1 . . .