| 摘要 |
PROBLEM TO BE SOLVED: To confirm whether or not an inputted password can be reasoned from an entry word included in a dictionary or the individual information of a user, and to register the password only when safety is confirmed. SOLUTION: This system is provided with a password length confirming equipment for inspecting whether or not the length of the character string of an inputted password is within a set range, a kind of character confirming equipment for inspecting whether or not the kind of characters used for the password is the set kind of characters, a hash value generator for generating a hash value from the password, a dictionary data base for preliminarily storing the has value of the entry word, and a password confirming equipment for deciding whether or not the hash value of the password whose password length is confirmed and whose kind of characters is confirmed is compared with the hash value stored in the dictionary data base, and for deciding whether or not this hash value is matched with the stored hash value of the entry word, and for registering the has value of the password when they are not matched with each other.
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