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.