Decoders and external security modules e.g. access control card, pairing method for digital data security, involves permitting access to data if modules and decoders identifiers are present respectively in list in decoders and modules

摘要

The method involves storing a list of identifiers of decoders of receiver apparatuses in each of external security modules and storing a list of identifiers of the modules in the decoders. Access to data is permitted if the identifiers of the modules and the decoders are present in the lists stored in the decoders and modules, respectively, otherwise the access to the data is interfered. Independent claims are also included for the following: (A) a removable security interface (B) an access control system comprising several receiver apparatuses each susceptible to cooperate with several external security modules (C) a computer program for implementing decoders and external security modules pairing method.