SHARED RANDOM NUMBER MANAGEMENT METHOD AND MANAGEMENT SYSTEM IN SECRET COMMUNICATION NETWORK

摘要

A secret communication network formed by a center node and a plurality of remote nodes connected to the center node.  Random numbers are shared by the center node with each of the remote nodes.  A first random number shared by a first remote node and the center node is used as an encryption key to encrypt, at the center node, a second random number shared by a second remote node and the center node.  This is transmitted to the first remote node.  Thus, a second random number is shared as an encryption key by the first remote note and second remote node in a system.  A virtual remote node is provided for the center node.  A remote node is set as the first remote node while the virtual remote node is set as the second remote node so as to share the random numbers as has been described above.  Thus, random numbers can be shared as encryption keys by the remote nodes and the center node.