The method of forming private hypothetical network making use of public network

摘要

Purpose of this invention is executed, several computers or between multimedia unit, the data is exchanged and the operation which guarantees the security of these data simultaneously accompanies.The hypothetical private network which possesses the plural units where the purpose of this invention, each unit, has the security expedient which possesses specific number UA1, is connected to public network (VPN) forming, it is achieved by the method of using, but as for this method, the step which occurs the right Dn to be related to specific number UAn, due to the security expedient of unit Un; The step which at least transfers the aforementioned right Dn to the aforementioned security expedient of one unit Um; The step which encodes with the data and the description of the aforementioned Dn right which are sent by unit Un with cryptographic data key KS; The data which is encoded by second unit Um is received, the aforementioned data is presented to the aforementioned security expedient of the aforementioned unit Um, when verify, exist whether the aforementioned Dn right exists, the step which decodes the aforementioned data with the aforementioned cryptographic data key KS; It includes.