Abstract: A transferring system for huge and high quality images on network and a method thereof are disclosed, wherein various individual image data are converted into high quality image data to be converted into layered image data, and classified into a plurality of sub cells, then stored in database as a compressed form. A client system connected to a server requires information, immediately downloads the required information, releases the compression, and then displays on a screen real time. In the present invention, a user can fast see only his wanted part since images of a newspaper and a magazine are converted as they were. Also, various additional information is provided with image, thereby providing multimedia digital publication services on wire or wireless network.

Abstract: Method and system for virtual multicast networking, which can provide multicasting application service on non-multicast network that does not support multicast, are provided.

Abstract: Provided is a method for tracing-back an IP using marking information of a router stored on a hop-by-hop option header, which is one of IPv6 extension headers. According to the method, an attack made by an attacker is detected on the IPv6 network. If the attack is detected, information stored on a hop-by-hop option header of a packet received through the IPv6 network and marked by a router through which the packet has passed is extracted. After that, a reception path of the received packet is reconstructed and an IP of the attacker is back-traced using the extracted marking information.

Abstract: A transferring system for huge and high quality images on network and a method thereof are disclosed, wherein various individual image data are converted into high quality image data to be converted into layered image data, and classified into a plurality of sub cells, then stored in database as a compressed form. A client system connected to a server requires information, immediately downloads the required information, releases the compression, and then displays on a screen real time. In the present invention, a user can fast see only his wanted part since images of a newspaper and a magazine are converted as they were. Also, various additional information is provided with image, thereby providing multimedia digital publication services on wire or wireless network.