Abstract: A method for distributing a piece of content in a content distribution network, provided by a source entity of which the integrity is ensured by means of a private key, the method comprising the following steps implemented by a content distribution entity: —receiving a request to access the piece of content from a user device; —sending, to a proxy entity, a request to have at least one piece of data signed by means of the private key; —receiving the at least one piece of signed data, the at least one piece of signed data certifying the integrity of said distribution entity for the user device; —sending a public key associated with the private key to the user device; —sending the at least one piece of signed data to the user device and distributing the content to the user device.

Abstract: Method of acquisition in a communication network, of at least one coding/decoding module, for encoding/decoding at least one data stream relating to a session between a first and a second entity, an application dialogue being associated with said session, said method being implemented by the first entity and comprising the following steps: opening of said application dialogue associated with said session; reception from said second entity of a proposed list of coding/decoding modules for said session; selection from the received list of coding/decoding modules of at least one coding/decoding module to be acquired; acquisition of said at least one module from a supplier entity, the application dialogue being kept open; encoding/decoding of said at least one data stream relating to said session by means of said at least one module acquired.

Abstract: A method for distributing a piece of content in a content distribution network, provided by a source entity of which the integrity is ensured by means of a private key, said method comprising the following steps implemented by a content distribution entity:—receiving a request to access said piece of content from a user device;—sending, to a proxy entity, a request to have at least one piece of data signed by means of the private key;—receiving said at least one piece of signed data, said at least one piece of signed data certifying the integrity of said distribution entity for the user device;—sending a public key associated with the private key to the user device;—sending said at least one piece of signed data to the user device and distributing the content to the user device.