Patent ID: 11902270
Assignee: ORANGE
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 4:
5. A method of recording usage data for a relay implemented in a computer network comprising at least one source device, one destination device, at least one shared memory and at least one relay constituting a circuit to set up a communication between the source device and the destination device, the method being implemented in each of the at least one relay and comprising:
sending the identifier of the relay to the source device;
receiving a PoU frame coming from the source device or from the preceding relay within the circuit;
computing a challenge of the relay and a signature of a concatenation of challenges and signatures of the source device and preceding relays with the challenge, using a key proper to the relay;
adding at least this signature and a value of the challenge used by each of the at least one relay to compute the signatures to the PoU frame and transmitting the PoU frame to the destination device or to the relay present in the circuit in the direction of the destination device, depending on the position of the relay in the circuit;
receiving at least one transaction frame coming from the source device or from the destination device, the transaction frame comprising at least the signatures of each of the at least one relay contained in the PoU frame; and
sending, following the reception of each transaction, a request for recording, in a shared memory, a proof of use of the relay comprising at least the signatures of each of the at least one relay of the circuit.