| Internet conference become a high efficiency intercommunication means in common use at present.It has become a necessary step encrypting conference information to provide a secure Internet meeting. Electronic conference system with the core distributing conference key had become an important subject in explosive growth Internet environments.How to assign encrypt or decrypt key, namely conference key, which shared by meeting attendees become a hot investigation. The technic of cryptogram which consered with the design of key distribution protocol is discussed in this paper.And the emphases of this discustion is about the encrypt algorithm,digital signature, one-way hash function and the choosing of these algorithms.Before the detailed expatiate on our protocol,three kinds of conference key distribution is presented.The design of key distribution protocol under symmetric and public key algorithm encrypt system are primaryly probed into.Some classic protocols, especially protocols with KDC model,are discussed. And several skills are summatized to apply in our protocol design.The scheme in this paper is just conceived base on the analysis of a trusted server conference key distribution protocol.After some amendment to this scheme, a vector space shareing scheme is fecthed in to construct our protocol.The simulative system of our protocol is accomplished with centralized authentication characteristic. With this scheme, the security of conference communications within the computer network is reliably provided. This scheme has a good efficiency in distribution of conference key with linear calculation, and can achieve dynamic conference key updating.Therefore it is of theory value and worth being used. |
