Method for transmitting content using a quantum key distribution network

A device for controlling a transmission of content between two transmission nodes of a communication network comprising said two transmission nodes and at least one other transmission node, called intermediate transmission node, said transmission nodes also being included in a quantum key distribution network for keys, called quantum keys, the communication network comprising a key management device connected to said transmission nodes and connected to said quantum key distribution network, said transmission nodes each comprising a plurality of communication interfaces for communicating in the communication network and a plurality of quantum key transmission interfaces for transmitting and receiving said quantum keys in said quantum key distribution network, and said transmission nodes being further configured to each perform a key derivation function and send a result thereof to said key management device and to each perform a key extraction function from information received from said key management device and a quantum key, said communication network further comprising said control plan management device connected to said transmission nodes and to said key management device and, the device comprising:

• electrical and electronic circuitry, contained in an item of equipment or a system, configured to organize a sequence of operations for securely transferring content between two transmission nodes of the communication network configured for:
• receiving, from a node, called source node, from among said two transmission nodes, a request message requesting transmission of said content to the other node, called recipient node, from among said two transmission nodes, said request message comprising an identifier of said recipient node;
• acquiring a route determined as passing through said at least one intermediate transmission node or through a series of intermediate transmission nodes between said source node and said recipient node, and a service identifier for transmitting said content associated with said route;
• and
• transmitting and receiving control messages to and from said transmission nodes and to said key management device, suitable for generating key transmissions between pairs of nodes from among said nodes, defined according to said route determined in relation to said transmission service identifier.