Patent ID: 8208626
Filing Date: 2012-06-26
Classification: G06F,H04L

Abstract:
1. A method of determining coordinates for a fault detection operation, comprising: determining a first point and a second point in a binary finite field, the first and second points established based on a basic point within a given elliptic curve, each of the first and second points including a first coordinate value and a second coordinate value; performing a first addition operation on the first point and the second point to compute a third coordinate value, using a first-coordinate computing unit; and performing a second addition operation on the first and second points to compute a fourth coordinate value, using a second-coordinate computing unit, the first and second addition operations computed based on at least one of a difference between the first coordinate values of the first and second points and a difference between the second coordinate values of the first and second points; determining whether a fault has been injected into a cryptographic system based on a resultant point, the resultant point being a point represented by the third and fourth coordinate values; and issuing a warning based on the determination, wherein the first coordinate values and the third coordinate value correspond to X-axis coordinates and the second coordinate values and the fourth coordinate value correspond to Z-axis coordinates, and wherein if the first point is denoted as P