Patent ID: 7127620

Claim:
A coding device for at least one of implementing cryptographic encryption and access authorization, comprising: a data processing unit programmed to implement cryptographic operations; an external data interface; an internal data interface; a decoupling unit connected to said data processing unit, said external data interface, and to said internal data interface, said decoupling unit decoupling said external data interface from said internal data interface; a main clock supply unit generating a main clock signal, said main clock supply unit connected to said data processing unit; a power profile generator unit for generating an interference power profile, said power profile generator unit connected to said main clock supply unit and to said data processing unit, said power profile generator unit having a secondary clock supply unit for generating a secondary clock signal, and said power profile generator unit having a synchronizing circuit for generating a power profile generator clock signal based upon said main clock signal and said secondary clock signal, said synchronizing circuit having an adjustable delay element for delaying said main clock signal; and a power supply interface for supplying power to the coding device, said power supply interface connected to said data processing unit and said power profile generator unit.