KEY DISTRIBUTION SYSTEM AND METHOD OF ITS FUNCTIONING Russian patent published in 2008 - IPC H04L9/08 

FIELD: information technology.

SUBSTANCE: system and the method of information protection in computer networks based on key distribution, includes numerous units and a trust centre (TC). All the units are connected with one another and with the TC by communication channels. Each unit of the network and the TC has executive processor circuit as well as memory. TC includes the pseudo-random number generator designed to generate long-term keys, key blocks, primary incidence sub-matrix of lower size for building the incidence matrix (IM) of the required size; to form half-weight columns with the required number of binary bits for building the IM of the required size on the basis of the primary lower-size sub-matrix, with the extension capacity of the IM depending on the number of the network units communicating to one another to transfer the formed key blocks to the network units involved in the data exchange process through the communication channels. One key block corresponds to each unit; the processor executive circuits of the network units form the common secret key in order to ensure confidentiality while exchanging information between the units.

EFFECT: simplification of the key distribution method.

10 cl, 2 dwg