Patent ID: 8085797

Claim:
Method for addressing and routing in coded communications relationships in at least two different network levels with different routing levels, which are separated from one another within a network, said method comprising: demarcating a first, public network level with the associated first routing level from a second, confidential network level with a second routing level via at least one coding device; determining and storing a network topology of both network levels independently from one another in respective routing tables in the at least two routing levels, wherein the routing table for the first, public network level contains all of the information about the users in the first, public network level and is stored in a first public network level network device within a domain of the first, public network level, wherein the routing table for the second, confidential network level contains all of the information about the users in the second, confidential network level and is stored in a second, confidential network level network device within a domain of the second, confidential network level; providing an interface with an unambiguous allocation of addresses of the second routing level to addresses of the first routing level in the coding device; storing the interface between a public and a confidential network level or respectively between a public and a confidential routing level in look-up tables in the coding device before its start-up, wherein the look-up tables are stored in the coding device within the domain of a third, intermediate network level; obtaining an updating of a confidential routing table from locally-available, time-variable information in the first, public network level using the look-up tables in the coding device; and as a realization of a function which describes the relationship between public and confidential addresses, distributing the contents of the look-up tables exclusively within the confidential domain, wherein the second, confidential network is derived from the topology of the first, public network using the look-up table without requiring a pass through an IPSec discovery protocol.