Abstract: Disclosed in the present disclosure is a commutative encryption and watermarking method based on a chaotic system and a zero watermark for vector geospatial data. According to the method, firstly, the vector geospatial data are scrambled and encrypted by using chaotic sequences generated by a composite chaotic system. Then, vector geospatial elements are randomly combined in pairs. A feature matrix is constructed according to the number of vertex coordinates of the vector geospatial elements in combinations, and the parity of the number. Finally, an XOR operation is performed on the feature matrix and the watermark image to construct a zero watermark image, and the zero watermark is constructed through invariant features of the vector geospatial data.

Abstract: The disclosure provides a reversible watermarking method for the oblique photography three-dimensional models with controllable accuracy. According to the disclosure: firstly, by using the global stability of the average included angle of vertex normal vector, the feature points of the oblique photography three-dimensional model are extracted; secondly, the mapping relationship is established by the ratio of the distance between feature points and non-feature points, and the vertexes are grouped, and each group consists of a feature point corresponding to several non-feature points; finally, the spherical coordinate system is constructed by taking the feature points as the coordinate origin in grouping, and the watermark is embedded by modifying the radius of the coordinate system.

Abstract: A network element implements a method to support a plurality of network services between a computing device and the network element over non-channelized media using a single subscriber session. The method includes receiving from a computing device a request for a first network service that includes a Media Access Control (MAC) address of the computing device, retrieving a user record from a database server based on the MAC address of the computing device, determining from the user record whether the computing device supports the first network service and a second network service, and upon determining that the computing device supports the first network service and the second network service, creating a single dual-stack session that combines the first network service and the second network service.

Abstract: A network element implements a method to support a plurality of network services between a residential gateway and the network element over non-channelized media using a single subscriber session. The method includes receiving from a residential gateway a request for a network service that includes a Media Access Control (MAC) address of the residential gateway, determining whether the MAC address of the residential gateway matches a MAC address of an existing subscriber session for a previously configured network service, and upon determining that the MAC address of the residential gateway matches the MAC address of the existing subscriber session, consolidating a subscriber session for the network service and the existing subscriber session into a single dual-stack session. The method further includes enabling the residential gateway to access the network service where the network service and the previously configured network service are managed by the single dual-stack session.

Abstract: A network element implements a method to support a plurality of network services between a computing device and the network element over non-channelized media using a single subscriber session. The method includes receiving from a computing device a request for a first network service that includes a Media Access Control (MAC) address of the computing device, retrieving a user record from a database server based on the MAC address of the computing device, determining from the user record whether the computing device supports the first network service and a second network service, and upon determining that the computing device supports the first network service and the second network service, creating a single dual-stack session that combines the first network service and the second network service.

Abstract: A primary server and a backup server that both run a RADIUS client in a cold start configuration share a single IP address that includes a limited number of message identifiers (MIDs). The primary server and the backup server each have a small number of fixed message identifiers. In addition, a large number of shared message identifiers are used by the primary server, and then used by the backup server a predetermined time after the primary server fails.

Abstract: A primary server and a backup server that both run a RADIUS client in a cold start configuration share a single IP address that includes a limited number of message identifiers (MIDs). The primary server and the backup server each have a small number of fixed message identifiers. In addition, a large number of shared message identifiers are used by the primary server, and then used by the backup server a predetermined time after the primary server fails.

Abstract: A primary server and a backup server that both run a RADIUS client in a cold start configuration share a single IP address that includes a limited number of message identifiers (MIDs). The primary server and the backup server each have a small number of fixed message identifiers. In addition, a large number of shared message identifiers are used by the primary server, and then used by the backup server a predetermined time after the primary server fails.

Abstract: A primary server and a backup server that both run a RADIUS client in a cold start configuration share a single IP address that includes a limited number of message identifiers (MIDs). The primary server and the backup server each have a small number of fixed message identifiers. In addition, a large number of shared message identifiers are used by the primary server, and then used by the backup server a predetermined time after the primary server fails.