resource groups according to the determined connection mode comparing hierarchical connections between the respective separated user groups and resource groups and removing an overlapping hierarchical connection and recombining the separate hierarchical connections except for the overlapping hierarchical connection and configuring an entire network application_number US 97887707 A description hereinafter exemplary embodiments of the present invention will be described in detail however the present invention is not limited to the embodiments disclosed below but can be implemented in various forms the following embodiments are described in order to enable those of ordinary skill in the art to embody and practice the present invention fig1 illustrates an example of hierarchical network connections between user groups and resource groups according to the present invention referring to fig1 connections between user groups 101 and resource groups 105 in a general network 103 are shown in the network 103 the user groups 101 and the resource groups 105 can be hierarchically connected each user group 101 may be connected with the plurality of resource groups 105 and also each resource group 105 may be connected with the plurality of user groups 101 in the hierarchical connection network 103 the user groups 101 and the resource groups 105 may communicate with each other here when the user groups 101 freely withdraw from join and change the resource groups 105 information security on the withdrawal joining and change must be ensured such an.