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Password updating system to vary the password updating intervals according to access frequency
| Details |
Inventors: Kadooka, Etsuko;
Assignee: NEC Corporation (Tokyo, JP)
Primary Examiner: Beausouel, Jr.; Robert W.
Assistant Examiner: Wright; Norman M.
Attorney, Agent or Firm: Foley & Lardner
A password updating system sets the available period and the updating period of the password for each individual user according to the frequency of his accesses to the computer system, and manages password updating by urging the user in advance to change his password on the basis of these periods. There is a chronometric unit; and a password hysteresis memory unit for memorizing and managing passwords and their available periods. An update processing unit checks the input password, requests reentry if the same password exists or updates it if no same password exists, invalidates the current password if the updating period of the password has expired, and also validates invalidated passwords. There is a comparator unit for comparing the available periods of passwords and notifying the update processing unit of a request to update the password. Also provided is a period setting unit for prescribing, upon setting of each password, the available period and the update set period of that password on the basis of the analysis of the frequency of accesses, and conveying that information to the password hysteresis memory unit. A display unit displays various messages; and an input unit inputs various information. |
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DETAILED DESCRIPTION According to one aspect of the invention, there is provided a password updating system which sets the available period and the updating period of the password for each individual user according to the frequency of his accesses to the computer system, and manages password updating by urging in advance the user to change his password on the basis of these periods.
The system includes a chronometric unit for counting date and hour information.
There is also an input unit for entering user numbers and passwords, and password validating instructions for cancelling password invalidation.
A display unit displays password change requesting messages and password reentry requesting messages.
Also provided is a password hysteresis memory unit for memorizing and managing passwords so far set and their available periods on a user-by-user basis.
The system further includes a comparator unit for comparing, when a password is entered into the computer system to log it in, the current date and hour given from the chronometric unit and the available period of the currently used password stored in the password hysteresis memory unit, and notifying update processing unit of a request to update the password if it is in its updating period.
Also provided is an update processing unit responsive to an update request from this comparator unit for giving a request for display of a password change requesting message to the display unit, receiving an updated password from the input unit, searching passwords stored in the password hysteresis memory unit to check whether or not the same password exists among the passwords so far set, requesting reentry if it does or updating the password if it does not, invalidating the current password if the updating period of the password has expired, and also validating invalidated passwords.
There is a period setting unit for analyzing the frequency of accesses to the computer system by each user by receiving a date and hour of access to the system from the chronometric unit and receiving the user number from the input unit at the date and hour of access, prescribing upon setting of each password the available period and the update set period of that password, and conveying that information to the password hysteresis memory unit
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Finance 
