Method of countering side-channel attacks in elliptic curve cryptosystem

摘要

This method corresponding to side-channel attack on elliptic curve cryptography system (Side Channel Attack) it is disclosed. Method corresponding to the sub-channel attack on elliptic curve cryptosystem in accordance with an embodiment of the present invention, the step of extending the definition area of the elliptic curve elliptic curve cryptographic system to expand the ring in a first area (Extension Ring), the extension creating a temporary cipher text in the ring, and, when the error injection attack on the step and the elliptic curve encryption system corresponding to the sub-channel attack on the elliptic curve cryptosystem, not checked, produce the final cipher text to the first region which comprises the steps: The step that corresponds to the sub-channel attack on the elliptic curve cryptosystem can include a step of checking for error injection attack on the step and the elliptic curve cryptosystem to defend against power analysis attacks on the elliptic curve cryptosystem. Method corresponding to the sub-channel attack on elliptic curve cryptography system according to the invention has the advantage of reducing the computational overhead of the system while enhancing the reliability of the encryption system.