| 摘要 |
The method involves determining a point belonging to an elliptical curve defined on a finite characteristic body, and executing a simplified Shallue-Woestijne-Ulas (SWU) encoding function from an element shared between devices (101, 102) by execution units (111, 112). The function is executed by one of the devices by using a representation system i.e. Jacobean representation system, of coordinates of points, where the system is different from affine representation system of coordinates of points. A correction step is performed for obtaining an equivalent point identical between the devices. Independent claims are also included for the following: (1) a computer program product comprising program code instructions for implementing a method for executing a portion of cryptographic calculation (2) a non-transitory computer-readable storage medium storing a computer program that comprises program code instructions for implementing a method for executing a portion of cryptographic calculation (3) a device comprising units for implementing a method for executing a portion of cryptographic calculation. |
