The aim of this invention is to be able to recover specific information of a security module when it has been replaced by a new module in a user unit connected to a broadcasting network.This aim is reached by a method of storage and transmission of information generated by a first security module connected to a user unit, this first security module comprising a unique identifier and information representative of its functioning, this first module being able to be replaced by a second security module, this method comprising the following steps: determination of the specific information contained in the first security module intended for transmission, transfer of this information in the user unit, storage of this information in the user unit, replacement of the first security module by the second security module, connection of the user unit on a transmission network, initialization of a communication between the second security module and a management center, insertion by the user unit, of a data block in the blocks transmitted by the second module, this block comprising the identifier of the first module and the data specific to said first module.