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Based on the Chaotic Coupled Map Network (CCMN), a novel scheme for constructing Hash functions is proposed in this paper. The scheme changes the original input message and divides it into blocks, which are used as the given CCMN's coupling coefficient. The proposed scheme uses the changed initial message to control the parameters of chaotic system and(More)
Traditional group key generating methods using binary-tree performs efficiently when adding or deleting nodes dynamically. However, when dealing with paroxysmal needs for group key among multi-nodes in the Internet, their time complexity grows to O(Nlog2N). We propose an improved group key agreement protocol based on Diffie-Hellman key exchange, which can(More)
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