| 摘要 |
A signature generation apparatus (1) includes basic operation execution units (2)-(6) each executing a basic operation included in a signature generation procedure; and a whole operation controller (7) connected to the basic operation execution units (2)-(6) to control operations in the basic operation execution units (2)-(6) and monitor operation states of the basic operation execution units (2)-(6), in which when there is a basic operation execution unit among the basic operation execution units (2)-(6) which is executing a secret operation which uses data to be concealed as an argument, the whole operation controller (7) causes other basic operation execution units than the basic operation execution unit to simultaneously execute a random number operation which uses a random number as an argument. Accordingly, the signature generation apparatus (1) is able to have a high tolerance for side-channel attacks without causing a decrease in signature generation speed, an increase in power consumption, an increase in circuit size and the like. |
