The method of backing up and restoring secret information utilizing asymmetric application of Diffie-Hellman and elliptic curve Diffie-Hellman algorithm

摘要

The purpose of the present invention provides a safe secret information backing up and restoring method ensuring availability using a Diffie Hellman algorithm and an elliptic curve Diffie Hellman algorithm for asynchronous applications, which stores a public key of a user terminal generated by a Diffie Hellman algorithm in a separate public key server which is not a backup server storing encrypted secret information and manages the public key, and restores the secret information by using the public key of the user terminal and a private key of the backup server.