US5367572A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for personal identification
Assignee: EMC Corp
•
Filing: 1992-07-31
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Granted: 1994-11-22
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Expires: 2012-07-31
Abstract
Abstract A method and apparatus for providing improved security for a personal identification number (PIN) in a personal identification and verification system of the type wherein a time dependent nonpredictable code is generated at a device in the possession of the individual, which code is unique to the individual and this code is communicated to, and compared with a nonpredictable code generated at a central verification computer. In this system, the PIN is mixed with the nonpredictable code before transmission of these values to the central verification computer. A nonsecret code is previously transmitted to the central verification computer and is used to retrieve the PIN and the appropriate nonpredictable code for the user. These values are used to strip the PIN from the transmitted nonpredictable code and the stripped PIN and remaining nonpredictable code are compared with the corresponding retrieved values in order to determine verification.
Inventors
- 👤 Kenneth P. Weiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:23
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/58; G06F7/582; G06F21/00; G06F21/30; G06F21/31; G06F21/313; G06F21/34; G06F21/35; G06F21/70; G06F21/71; G06F21/72; G06F21/725; G06Q; G06Q20/00; G06Q20/30; G06Q20/34; G06Q20/341; G06Q20/346; G06Q20/38; G06Q20/385; G06Q20/40; G06Q20/401; G06Q20/4012; G06Q20/409; G06Q20/4097; G06Q20/40975; G07; G07C; G07C9/00; G07C9/20; G07C9/215; G07C9/30; G07C9/32; G07C9/33; G07F; G07F7/00; G07F7/08; G07F7/10; G07F7/1008; G07F7/1016; G06F2211/00; G06F2211/007; G06F2221/00; G06F2221/21; G06F2221/2103
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
143 words
A system for verifying an individual, the system being of the type wherein a user is provided with a nonsecret identification, with a secret PIN and with a user device generating a unique, time-varying, nonpredictable code, the nonpredictable code at a given time being provided to a central verification computer to effect verification, the system characterized by: the user device having means for inputting the PIN, and means for utilizing the PIN in an algorithm to produce the nonpredictable code for a given time interval; and the central verification computer having means for receiving the nonsecret identification and the nonpredictable code produced at the user device, means for utilizing the nonsecret identification to obtain the time-varying nonpredictable code for the user for the given time interval, and means for utilizing the communicated nonpredictable code and the obtained nonpredictable code to verify the user.
Claim 2
Independent Claim
143 words
A system for verifying an individual, the system being of the type wherein a user is provided with a nonsecret identification, with a secret PIN and with a user device generating a unique, time-varying, nonpredictable code, the nonpredictable code at a given time being provided to a central verification computer to effect verification, the system characterized by: the user device having means for inputting the PIN, and means for utilizing the PIN in an algorithm to produce the nonpredictable code for a given time interval; and the central verification computer having means for receiving the nonsecret identification and the nonpredictable code produced at the user device, means for utilizing the nonsecret identification to obtain the time-varying nonpredictable code for the user for the given time interval, and means for utilizing the communicated nonpredictable code and the obtained nonpredictable code to verify the user.
Claim 3
Dependent Claim
30 words
A system as claimed in claim 1, including a coded value stored at the user device which value is utilized in addition to the PIN to produce the nonpredictable code.
Claim 4
Dependent Claim
54 words
A system as claimed in claim 2 wherein said means for utilizing includes a first means for utilizing a value related to the coded value to produce a nonpredictable value, and a second means for utilizing the PIN to modify at least one of the input to and the output from the first means.
Claim 5
Dependent Claim
47 words
A system as claimed in claim 3 wherein the value utilized by the first means is the stored coded value, and wherein said second means includes a means for utilizing the PIN to modify the nonpredictable value output from the first means to produce the nonpredictable code.
Claim 6
Independent Claim
108 words
A method for identifying an individual comprising the steps of: inputting a PIN for the individual into a device in the possession of the individual; utilizing the inputted PIN in an algorithm to produce at the device a nonpredictable code for a given time interval; and communicating a nonsecret identifying code for the individual and the nonpredictable code to a central verification computer, the verification computer receiving the communicated nonsecret identification and the nonpredictable code, utilizing the nonsecret identification to obtain the time-varying nonpredictable code for the individual for the given time interval, and utilizing the communicated nonpredictable code and the obtained nonpredictable code to verify the individual.
Claim 7
Independent Claim
108 words
A method for identifying an individual comprising the steps of: inputting a PIN for the individual into a device in the possession of the individual; utilizing the inputted PIN in an algorithm to produce at the device a nonpredictable code for a given time interval; and communicating a nonsecret identifying code for the individual and the nonpredictable code to a central verification computer, the verification computer receiving the communicated nonsecret identification and the nonpredictable code, utilizing the nonsecret identification to obtain the time-varying nonpredictable code for the individual for the given time interval, and utilizing the communicated nonpredictable code and the obtained nonpredictable code to verify the individual.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-11-21 | 1998-05-23 | 1998-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-11-21 | 2002-05-23 | 2002-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-11-21 | 2006-05-23 | 2006-11-22 | $7700.00 | Window Closed / Lapsed |