National Yang Ming Chiao Tung University

National Sun Yat-Sen University of Kaohsiung

Ruei-Hau Hsu

Jyh-Cheng Chen

Chun Chien

Wei-Lun Shih

Chun-I Fan

Jui-Chih Chin

Yi-Hui Lin

A compression method featuring dynamic coding for wireless communication in wireless network is used to transmit a packet to clients. An access point (AP) divides a packet into several chunks all having a fixed length, sorts repetition frequencies of all the chunks, and encodes the repeated chunks with Huffman codes. Before transmitting the packet, AP divides the packet into chunks and determines whether there are chunks having been encoded, and transmits the encoded packet and the codes thereof to a specified client and other clients within coverage of transmission. After receiving the encoded packets, the client decodes the encoded packets to recover the original ones. The other clients also store the repeated chunks and the codes thereof. The information of the Huffman codes of the repeated chunks needn't be transmitted every time for different clients since other clients may overhear the Huffman codes not intended to send to them.

Compression method featuring dynamic coding for wireless communication in wireless networks

A symmetric dynamic authentication and key exchange system and a method thereof are provided. A client and a server obtain initial authentication information at the same time, the client generates first one-time temporary authentication information, a conference key and a standby identity identifier according to the initial authentication information, and transmits them to the server, and the server performs a dynamic authentication program. The server compares the initial authentication information of the client with the conference key to confirm an identity of the client, and then updates the initial authentication information of the server according to the first one-time temporary authentication information, and the server is enabled to have the first one-time temporary authentication information the same as that of the client, and then to generate second one-time temporary authentication information including the standby identity identifier according to the first one-time temporary authentication information and the initial authentication information.

Symmetric dynamic authentication and key exchange system and method thereof

Growing community of inventors

Kaohsiung, Taiwan

Ruei-Hau Hsu