Patent ID: 6766452
Filing Date: 2004-07-20
Classification: G06Q,G07F

Abstract:
A method of checking the authenticity of a digital circuit, comprising:providing a first electrical device, the first electrical device including a first set of software-controlled functions and a first digital circuit, the first digital circuit having a first set of components, and further providing a second digital circuit, the second digital circuit external to the first digital circuit, the first digital circuit having a first data path arrangement, the first data path arrangement associated with a first operating mode, and configured to perform a first logical function with the first set of components; the first digital circuit communicating with the second digital circuit, and receiving therefrom at least a first digital data; reconfiguring at least a portion of the first set of software-controlled functions and the first digital circuit so as to perform a second logical function that is different from the first logical function; performing, by means of the reconfigured first set of software-controlled functions and the reconfigured first digital circuit, one or more operations on the first digital data so as produce a second digital data; and transmitting the second digital data from the first electrical device to the second digital circuit.