METHOD FOR EVALUATING ELLIPTIC CURVE CRYPTOSYSTEM

摘要

PURPOSE: A method for calculating elliptic curve cryptogram is provided to simplify operation of prime finite field, thereby improving operation function by minimizing implementation area of encryption processor. CONSTITUTION: A controller transmits A0 unit bit of A register(110) and B4 unit bit of B register to multiplier(130). A operation result value of the multiplier is outputted to Mul_h, Mul_l. The Mul_h is added in C4 unit bit and adder(141). The Mul_l is added in C5 unit bit and adder(142). An output of a multiplier is stored in C4 and C5 of the C register. A multiple result of A0 and B3 is respectively added with storage values of C3 and C4 in the adders.