Group key exchange protocols are basic protocols to provide privacy and integrity in secure group communication. This paper discusses the security of one type of group key exchange protocols and defines the kind of pr...Group key exchange protocols are basic protocols to provide privacy and integrity in secure group communication. This paper discusses the security of one type of group key exchange protocols and defines the kind of protocols as broadcaster group protocols. It points out two attacks on this kind of protocols. The first attack can be avoided by using fresh values in each action during one session of the group protocol. The second attack should be related with concrete application. It also proposes a dynamic key agreement protocol as an example of solutions at the last part of the paper.展开更多
During the continuous development of society in recent years, China's radio and television industry has made great progress. The issue of safe broadcasting is very important and occupies a key position. The most i...During the continuous development of society in recent years, China's radio and television industry has made great progress. The issue of safe broadcasting is very important and occupies a key position. The most important responsibility of the radio and television industry is to bring higher quality services to the audience. Therefore, the quality of radio and television will affect the development of the industry to a certain extent. It is necessary to pay attention to the safety broadcasting in the transmission and transmission of radio and television signals. But in fact, the transmission and transmission of radio and television signals will be interfered by many factors, affecting the safe broadcast. This paper analyzes this, first judge the factors that lead to the transmission and transmission problems of radio and television signals, and further put forward the scheme of safe broadcasting, hoping to promote the transmission and transmission of radio and television signals more smoothly.展开更多
基金Supported by the National Natural Science Foun-dation of China (90104005 ,60473023) the National High Tech-nology Research and Development Programof China (863 Program)(2002AA41051)
文摘Group key exchange protocols are basic protocols to provide privacy and integrity in secure group communication. This paper discusses the security of one type of group key exchange protocols and defines the kind of protocols as broadcaster group protocols. It points out two attacks on this kind of protocols. The first attack can be avoided by using fresh values in each action during one session of the group protocol. The second attack should be related with concrete application. It also proposes a dynamic key agreement protocol as an example of solutions at the last part of the paper.
文摘During the continuous development of society in recent years, China's radio and television industry has made great progress. The issue of safe broadcasting is very important and occupies a key position. The most important responsibility of the radio and television industry is to bring higher quality services to the audience. Therefore, the quality of radio and television will affect the development of the industry to a certain extent. It is necessary to pay attention to the safety broadcasting in the transmission and transmission of radio and television signals. But in fact, the transmission and transmission of radio and television signals will be interfered by many factors, affecting the safe broadcast. This paper analyzes this, first judge the factors that lead to the transmission and transmission problems of radio and television signals, and further put forward the scheme of safe broadcasting, hoping to promote the transmission and transmission of radio and television signals more smoothly.
