Nec Corporation

Nec Europe Ltd.

Nico D'Heureuse

Hans-Joerg Kolbe

Fabian Schneider

Saverio Niccolini

Jan Seedorf

Peer Hasselmeyer

Thomas Dietz

Marcus Schoeller

Sibylle Schaller

A method for controlling an underlying physical network by a software defined network includes providing a physical network that comprises routers for routing data traffic on a data communication plane, providing a software defined network that comprises at least one controller and at least one feature on a control plane for controlling the data forwarding elements of the physical network, communicating, by the data forwarding elements of the data communication plane, with the controller of the control plane on a dedicated control channel, communicating, by the controller, with the at least one feature on a dedicated feature channel in the control plane, and exchanging, via the data communication plane, at least a portion of the data traffic in the control plane.

Method and system for controlling an underlying physical network by a software defined network

A method for verifying the identity of a communication partner, in particular in real-time communications, wherein a caller (A) sends a message towards a callee (B), and wherein the caller (A) attaches a self-signed certificate to the message, characterized in that the caller (A) and the callee (B) are part of a web-of-trust, wherein certificates of users within the web-of-trust are stored by one or more key-servers (), wherein trust relationships between users within the web-of-trust are employed to compute a trust-chain between the caller (A) and the callee (B) based upon the certificate attached to the message and upon the callee's certificate, and wherein the further processing of the message received by the callee (B) is based on the length of the derived trust-chain. Furthermore, a corresponding system is described.

Method and system for verifying the identity of a communication partner

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Heidelberg, Germany

Nico D'Heureuse