A method of processing data, encrypted according to an encryption method specific to a first domain, in which such data cannot be decrypted without the aid of a first secret specific to the first domain The data is received in a presentation device connected to a network belonging to a second domain. The method comprises the steps of: (a) transmitting at least a portion of said encrypted data to a processing device connected to the network and; (b) receiving from said processing device at least one element being used to decrypt said received data with the aid of a second secret specific to the second domain, the second secret being contained in the presentation device.