One-time key generating method for public-key algorithm

摘要

PURPOSE: A method for generating throwaway key for open key coding algorithm is provided to make sure of a security in an information transport by enabling a server/client which uses an open key coding algorithm to have a throwaway key in common. CONSTITUTION: A first process(S100,S200) generates an open key candidate set and gets a server/client to have the open key candidate set in common. A second process(S300) selects an open key candidate through the server/client and performs a first authentification inter server/client. A third process(S400) performs a second authentification on the ground of an open key candidate of an opponent. A fourth process(S500) generates a secret key, a personal key, and an open key through a key generation algorithm. A fifth process(S600) performs a third authentification on the ground of the secret key, the personal key, and the open key. A sixth process(S700) determines a throwaway key for an open key coding algorithm.