Patent ID: 11876789
Assignee: NEDERLANDSE ORGANISATIE VOOR TOEGEPAST-NATUURWETENSCHAPPELIJK ONDERZOEK TNO
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 5:
6. A method, executed by a gateway device between a first communication network and a second communication network outside the gateway device, for handling communication between a first device in the first communication network and a second device in the second communication network, the method comprising:
receiving a communication request from the first device, directed to the second device, for performing a first cryptographic data communication protocol;
determining the first cryptographic data communication protocol is registered as unsafe in the gateway device; and
executing, in accordance with the determining the first cryptographic data communication protocol is registered as unsafe in the gateway device:
the first cryptographic data communication protocol between the first device and the gateway device, and
a second cryptographic data communication protocol, which is not recorded as unsafe in the gateway device, between the gateway device and the second device,

wherein the first cryptographic data communication protocol and the second cryptographic data communication protocol are executed sequentially to communicate data between the first and second device via the gateway, and
the method further comprising:
verifying, by the gateway device, a first signed certificate from the second device containing information for determining a cryptographic key for the second cryptographic data communication protocol;
generating, by the gateway device, a signed second certificate; and
transmitting, by the gateway device, the signed second certificate,
wherein the signed second certificate contains information for determining a cryptographic key for the first cryptographic data communication protocol.