Patent ID: 6883052
Filing Date: 2005-04-19
Classification: H04R

Abstract:
1. System for restricting access to data on a data carrier on which a medium code is stored in an accessible manner and on which data is stored which is only accessible after presenting a access code, which system comprises: a) a user apparatus incorporating means for reading the data carrier, b) a remote station incorporating a further suitably programmed processor cooperating with a memory in which a number of medium codes are stored, and whereby initiated by the user the communication means of the user apparatus establishes a connection over said communication network to the communication means of the remote station, where after the medium code is transferred from the user apparatus to the remote station via said connection, in the remote station the received medium code is compared to the at least one code stored in the memory and if the received code is equal to one of the stored codes then an access enabling signal is transferred back to the user station enabling the processor to obtain access to the data carrier, characterized in that the communication network is embodied as a mobile telephone network and the communication means are embodied as mobile telephone circuits incorporating the usual SIM code, that the memory of the remote station comprises a number of SIM codes and that together with the medium code the SIM code of the user apparatus mobile phone circuit are transferred to the remote station to be compared with the stored SIM codes whereby the access enabling signal is only transferred if the received SIM code corresponds with one of the stored SIM codes.