Key authentication method and key authentication apparatus

• US 5,768,387 A
• Filed: 07/31/1995
• Issued: 06/16/1998
• Est. Priority Date: 08/10/1994
• Status: Expired due to Term

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Yoshioka, Makoto, Akiyama, Ryota
• Primary Examiner(s): Barron, Jr., Gilberto
• Application Number:
  US08/509,008
• Time in Patent Office: 1,051 Days
• Field of Search: 380/4, 380/25, 382/122, 382/186
• US Class Current: 713/182
• CPC Class Codes: G06F 21/16 Program or content traceability, e.g. by watermarking
• CPC Class Codes: G06F 21/316 by observing the pattern of computer usage, e.g. typical user behaviour
• CPC Class Codes: G06F 2211/007 Encryption, En-/decode, En-/decipher, En-/decypher, Scramble, (De-)compress
• CPC Class Codes: G06Q 20/4012 Verifying personal identification numbers [PIN]
• CPC Class Codes: G07C 9/33 by means of a password

Abstract

A key authentication device and method which, through the use of user-unique information, prevents the improper use of software. The key authentication device is equipped with a software storage medium for storing software with encoded characters, graphs, images, or sound, and, when using the software of this software storage medium, employs an input characteristics detection section for detecting the characteristics of input operations performed by a user, a management center for encoding input characteristics detected by the input characteristics detection section and for generating consent information, and a comparison section for comparing the consent information generated by the management center with the input characteristics detected by the input characteristics detection section.

Claims

1. A key authentication apparatus having a software storage medium for storing software that comprises encoded programs, characters, graphs, images, or sound, the key authentication apparatus comprising:

input characteristics detection means for detecting characteristics of input operations performed by a user at a time the user uses the software of said software storage medium;

a management center for encoding the input characteristics detected by said input characteristics detection means and, in response, generating consent information; and

comparison means for comparing the consent information generated by said management center with the input characteristics detected by said input characteristics detection means, and if both are in correspondence with each other, for approving the use of said software.

2. The key authentication apparatus of claim 1, wherein said input characteristics detection means detects the characteristics of key inputs on a keyboard by the user.

3. The key authentication apparatus of claim 2, wherein said input characteristics detection means comprises:

a key-in interval detector device for detecting times from a measurement initiation time point to the key in of each key input at the time when the user keys in multiple keys; and

a key-in interval accumulator device for accumulating the key-in times of each key detected by said key-in interval detection device.

4. The key authentication apparatus of claim 1, wherein said input characteristics detection means detects characteristics of movements on an operating screen based upon a mouse.

5. The key authentication apparatus of claim 4, wherein said input characteristics detection means comprises:

a click location detector device to detect locations and times of mouse clicks upon an operating screen; and

a characteristics information generating section for generating the characteristics information from the locations and times detected by said click location detector device.

6. The key authentication apparatus of claim 1, wherein said input characteristics detection means detects characteristics of handwritten strokes of the user.

7. A key authentication method comprising:

an input characteristics detection step detecting characteristics of input operations performed by a user at a time when the user uses software of a software storage medium, wherein the software includes encoded programs, characters, graphs, images, or sound;

a consent information generation step encoding the input characteristics, and in response, generating consent information; and

a comparison step comparing the consent information and the input characteristics, and, in only those cases where both are in correspondence with each other, approving the use of said software.

8. The key authentication method of claim 7, wherein said input characteristics detection step comprises a step detecting characteristics of key inputs on a keyboard by a user.

9. The key authentication method of claim 8, wherein said input characteristics detection step comprises:

a key-in interval detection step detecting times from a measurement initiation time point to the key in of each key input when the user keys in multiple keys; and

a key-in interval accumulation step accumulating key-in times of each key detected in said key-in interval detection step.

10. The key authentication method of claim 7, wherein said input characteristics detection step detects characteristics of movements on an operating screen based upon a mouse.

11. The key authentication method of claim 10, wherein said input characteristics detection step comprises:

a click location detection step detecting locations and times of mouse clicks upon the operating screen; and

a characteristics information generation step generating the characteristics information from the locations and times detected in said click location detection step.

12. The key authentication method of claim 7, wherein said input characteristics detection step comprises a step detecting characteristics of handwritten strokes of the user.

13. A key authentication method comprising the steps of:

calling up, when encoded software is used at a terminal, a management center that manages use of each item of software;

sending from said terminal to said management center identification information that specifies the user at said terminal and input-characteristics information;

disconnecting calls that connect said terminal with said management center in response to sending said identification information to said management center;

retrieving a charge history of the user by said management center based on said identification information, and discriminating whether the user has an ability to pay usage fees for the software;

calling up said terminal by said management center if said user has the ability to pay usage fees for the software; and

sending consent information from said management center to said terminal to decode the software, said consent information being based upon said input-characteristics information.