Patent ID: 7664268

Claim:
A method for managing access to a signal representative of an event of a service provider, said method comprising: (a) receiving said signal in a smart card, said signal being scrambled using a scrambling key; (b) receiving, in said smart card, data representative of a first seed value, the first seed value representing a first point in a coordinate system; (c) generating, in said smart card, said scrambling key using said first seed value and a second seed value in a predetermined function, the second seed value representing a second point in the coordinate system, whereby secret sharing is implemented, said second seed value being permanently stored in said smart card, wherein said first and second seed values are points on a Euclidean plane; and (d) descrambling, in said smart card said signal using said generated scrambling key to provide a descrambled signal, wherein the step of generating said scrambling key comprises calculating the Y-intercept of a line formed on said Euclidean plane by said first and second seed values.