METHOD AND SERVER FOR COMPUTING AND ENFORCING A TRUSTED PATH IN A MULTI DOMAIN NETWORK

A method for computing and enforcing a trusted path between a first machine (VM1) in a source domain (DO1) and a second machine (VM2) in a destination domain (DO4) in a multi domain network, mainly comprises the steps of: - a) in the source domain (DO1) sending a trusted path computation request to each of the trusted neighboring domains (DO2, DO3); - b) in each trusted downwards neighboring domain (DO2), determining whether this latter is the destination domain or not, and -- if it is not the destination domain, seeking every next trusted downwards neighboring domain (DO3, DO4) and, --- seeking at least one trusted path segment that can reach a found next trusted downwards neighboring domain (DO4), and then forwarding the trusted path computation request to the found next trusted downwards neighboring domain (DO4); --- re-iterate all the step b ; -- if it is the destination domain (DO4), seeking within this destination domain every trusted path segment that can reach the second machine (VM2), and, if there is at least one such segment, sending a positive response message; - c) when all the trusted downwards neighboring domains (DO2, DO3) have been processed, re-iterate step b for each next trusted downwards neighboring domain (DO4).