Patent ID: 7159243

Claim:
A data carrier for the storage of data, which data carrier has a first interface for communication with a first communication device and which data carrier has a second interface for communication with a second communication device and which data carrier includes an electrical circuit arrangement, which circuit arrangement includes a first voltage supply means, a first clock generator, and a first signal conversion means of the first interface and a second voltage supply means, a second clock generator, and a second signal conversion means of the second interface and which circuit arrangement has memory means for the storage of data, which memory means has a first storage location, a second storage location, and a third storage location, and which circuit arrangement has a first memory access means, arranged between the first interface and the memory means, for accessing the first storage location, the third storage location, and not the second storage location of the memory means and which circuit arrangement has a second memory access means, arranged between the second interface and the memory means, for accessing the second storage location, the third storage location, and not the first storage location of the memory means and which circuit arrangement has access enabling means which enable the first storage location to be accessed only by the first memory access means, characterized in that the data carrier has additional memory access means adapted to cooperate with the second memory access means and adapted to access the first storage location and designed to verify an access authorization for the access to the first storage location, and in that after a positive result of the verification of the access authorization the second memory access means can, in addition, access the first storage location via the additional memory access means and via the first memory access means.