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US6076164A
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Authentication method and system using IC card
Assignee: KDDI Corp
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Filing: 1997-08-29
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Granted: 2000-06-13
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Expires: 2017-08-29
Abstract
Abstract A method and system for authenticating between a user or client and a network access entity such as a server or another client using an IC card. The method includes a step of executing an initial authentication using the IC card when the user first communicates with the network access entity, a step of commonly holding authentication information in both the user and the network access entity if the initial authentication achieves success, and a step of executing a re-authentication using the commonly held authentication information without using the IC card when the user communicates again with the same network access entity within a predetermined period of time after the last authentication.
Inventors
- 👤 Toshiaki Tanaka
- 👤 Satoshi Hada
- 👤 Mitsuru Yamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:45
CPC Classifications
G; G07; G07F; G07F7/00; G07F7/08; G07F7/10; G07F7/1008; G06; G06F; G06F21/00; G06F21/30; G06F21/31; G06F21/34; G06Q; G06Q20/00; G06Q20/30; G06Q20/34; G06Q20/341; G06Q20/38; G06Q20/40; G06Q20/409; G06Q20/4097; G06F2211/00; G06F2211/005
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
119 words
A method of authenticating between a user and a network access entity using an IC card, comprising the steps of: executing an initial authentication using the IC card when the user first communicates with the network access entity; commonly holding authentication information in both the user and the network access entity if the initial authentication achieves success; and executing a re-authentication using said commonly held authentication information without using the IC card when the user communicates again with the same network access entity within a predetermined period of time after the last authentication, wherein said initial authentication is an authentication using a public key cryptographic technique, and wherein said re-authentication is an authentication using a secret key cryptographic technique.
Claim 2
Independent Claim
119 words
A method of authenticating between a user and a network access entity using an IC card, comprising the steps of: executing an initial authentication using the IC card when the user first communicates with the network access entity; commonly holding authentication information in both the user and the network access entity if the initial authentication achieves success; and executing a re-authentication using said commonly held authentication information without using the IC card when the user communicates again with the same network access entity within a predetermined period of time after the last authentication, wherein said initial authentication is an authentication using a public key cryptographic technique, and wherein said re-authentication is an authentication using a secret key cryptographic technique.
Claim 3
Dependent Claim
44 words
The method as claimed in claim 1, wherein said initial authentication is executed when the user has no previous authentication information in said network access entity, and said re-authentication is executed when the user has said previous authentication information in said network access entity.
Claim 4
Dependent Claim
29 words
The method as claimed in claim 1, wherein said initial authentication is executed instead of the re-authentication when the predetermined period of time has passed after the last authentication.
Claim 5
Dependent Claim
28 words
The method as claimed in claim 1, wherein said authentication information is encrypted and the encrypted authentication information is sent between the user and the network access entity.
Claim 6
Dependent Claim
35 words
The method as claimed in claim 1, wherein said authentication information is updated to have different values at each time and the updated authentication information is sent between the user and the network access entity.
Claim 7
Independent Claim
122 words
A system for authenticating between a user and a network access entity using an IC card, comprising: means for executing an initial authentication using the IC card when the user first communicates with the network access entity; means for commonly holding authentication information in both the user and the network access entity if the initial authentication achieves success; and means for executing a re-authentication using said commonly held authentication information without using the IC card when the user communicates again with the same network access entity within a predetermined period of time after the last authentication, wherein said initial authentication is an authentication using a public key cryptographic technique, and wherein said re-authentication is an authentication using a secret key cryptographic technique.
Claim 8
Independent Claim
122 words
A system for authenticating between a user and a network access entity using an IC card, comprising: means for executing an initial authentication using the IC card when the user first communicates with the network access entity; means for commonly holding authentication information in both the user and the network access entity if the initial authentication achieves success; and means for executing a re-authentication using said commonly held authentication information without using the IC card when the user communicates again with the same network access entity within a predetermined period of time after the last authentication, wherein said initial authentication is an authentication using a public key cryptographic technique, and wherein said re-authentication is an authentication using a secret key cryptographic technique.
Claim 9
Dependent Claim
44 words
The method as claimed in claim 6, wherein said initial authentication is executed when the user has no previous authentication information in said network access entity, and said re-authentication is executed when the user has said previous authentication information in said network access entity.
Claim 10
Dependent Claim
29 words
The system as claimed in claim 6, wherein said initial authentication is executed instead of the re-authentication when the predetermined period of time has passed after the last authentication.
Claim 11
Dependent Claim
28 words
The system as claimed in claim 6, wherein said authentication information is encrypted and the encrypted authentication information is sent between the user and the network access entity.
Claim 12
Dependent Claim
35 words
The system as claimed in claim 6, wherein said authentication information is updated to have different values at each time and the updated authentication information is sent between the user and the network access entity.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-06-13 | 2003-12-13 | 2004-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-06-13 | 2007-12-13 | 2008-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-06-13 | 2011-12-13 | 2012-06-13 | $7700.00 | Window Closed / Lapsed |