PURPOSE: A method for managing various hash passwords using a verification key is provided to judge inconsistency due to random change of the password, by managing password consistency/inconsistency among hash passwords. ;CONSTITUTION: A hash password is generated. A verification key is generated using the hash password(401). The generated verification key is stored and managed(402). A verification key generated using a present hash password is compared with the stored verification key(403). Password synchronization is performed according to the inconsistency of the verification key(405).;COPYRIGHT KIPO 2011
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