Abstract: A device receives an attack on a Session Initiation Protocol (SIP) based device, and applies, based on a type of the attack, a method vulnerability based filter to the attack.

Abstract: A method for creating, modifying, and terminating connections between Internet end systems, particularly, although not exclusively, for Internet telephony communication. The method relies on several request messages sent between a client and a server and the response messages sent back in response. Each request and response message may contain one or more header fields which modify or more uniquely link the messages with a given connection. On this basis, advanced telephony services, such as call forwarding, call transferring, and multiparty conferencing are provided.

Abstract: A reservation is created within a network by sending a stateless probe from a source node toward a destination node. The stateless probe determines a reservation path between the source node and the destination node via intermediate routers in the network. A determination is made if the destination node agrees to create the reservation path to the source node. If the destination node agrees to create the reservation path to the source node, the reservation path is established by returning a corresponding response message to the source node. Links included in more than one established reservation path to the same destination node are identified. The multiple reservations on such links are aggregated. This aggregation creates a tree of reservations rooted at the destination node.

Abstract: A method for a client to locate a particular service from a service provider on wide area computer networks. The method includes multicasting of an advertisement from a service provider, which advertisement is detected by a Service Broker and in turn multicast into the wide area computer network. A client queries the network when seeking a particular service and receives in turn the address of the Broker and a Server to obtain the service desired.

Abstract: A method for protecting electronically published documents involves operating a computer system and network for electronic publication of documents, and includes the steps of receiving requests for documents from users having computers with display devices or printers, including with the requests unique user identification for each of the user; authenticating the requests with a copyright server; using the copyright server to direct a document server to act upon proper authentication of each request; using the document server to create uniquely encoded, compressed and encrypted documents for each authenticated request, where the documents have unique encoding corresponding to each of the users, and forwarding the documents to each authenticated request user through the network to corresponding agents of each authenticated request user, with each of the agents being selected from display agents and printer agents; and decrypting and uncompressing the documents at each of the agents and making the documents ava