Protection of network communications in the distributed educational system on the basis of intensive change of the encryption keys

The problem of organization of the process of the distribution of the encryption keys in the local network is studied. As an example the educational system is considered. An alternative procedure for the protection of the distribution process on the basis of intensive keys updating is offered. The formalized model of the problem is designed, the input parameters are described. The control parameters are an encryption, key length and the intensity of the key updating on each node of the network.