Patent US6658231B2 successfully refreshed from Google Patents.
Patent US5351302A successfully refreshed from Google Patents.
US5351302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for authenticating objects identified by images or other identifying information
Assignee: Individual
•
Filing: 1993-05-26
•
Granted: 1994-09-27
•
Expires: 2013-05-26
Abstract
Abstract The method and system of the present invention utilizes public-key cryptography to create "secure" titles for personal and real property such as vehicles and the like. The title preferably comprises a card in which is stored a digital signature of one or more identifiers such as a vehicle identification number, the vehicle license plate and the owner's name. To effect a transfer of the property, the digital signature on the title must first be shown to have been generated from the one or more identifiers.
Inventors
- 👤 Frank T. Leighton
- 👤 Silvio Micali
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:17
CPC Classifications
G; G07; G07F; G07F7/00; G07F7/08; G07F7/10; G07F7/1008; G06; G06Q; G06Q20/00; G06Q20/30; G06Q20/34; G06Q20/346; G06Q20/38; G06Q20/382; G06Q20/3821; G07F7/12; H; H04; H04L; H04L9/00; H04L9/32; H04L9/3247; H04L2209/00; H04L2209/84
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
78 words
A method for authenticating an object identified by a data string, the data string including a digitized image of the object, comprising the steps of: generating a signature of the data string using a private key of a public-key cryptosystem pair, the public-key cryptosystem pair also having a public key M; decrypting the signature using the public key M of the public-key cryptosystem pair; and comparing the decrypted signature with the digitized image to thereby authenticate the object.
Claim 2
Independent Claim
78 words
A method for authenticating an object identified by a data string, the data string including a digitized image of the object, comprising the steps of: generating a signature of the data string using a private key of a public-key cryptosystem pair, the public-key cryptosystem pair also having a public key M; decrypting the signature using the public key M of the public-key cryptosystem pair; and comparing the decrypted signature with the digitized image to thereby authenticate the object.
Claim 3
Dependent Claim
19 words
The method as described in claim 1 wherein the data string is stored in a card having a memory.
Claim 4
Dependent Claim
20 words
The method as described in claim 1 wherein the data string also includes information identifying an owner of the object.
Claim 5
Dependent Claim
20 words
The method as described in claim 1 wherein the data string also includes alphanumeric information uniquely associated with the object.
Claim 6
Dependent Claim
27 words
The method as described in claim 1 wherein the data string includes information identifying an owner of the object and alphanumeric information uniquely associated with the object.
Claim 7
Dependent Claim
26 words
The method as described in claim 5 wherein the owner information and the alphanumeric information are concatenated with the digitized image to form the data string.
Claim 8
Dependent Claim
18 words
The method as described in claim 1 wherein the data string includes a text string describing the object.
Claim 9
Independent Claim
87 words
A method for authenticating an object identified by a data string, the data string being stored on a storage media and including at least a digitized image of the object, comprising the steps of: receiving the storage media and generating a signature of the data string using a first key of a cryptosystem pair, the cryptosystem pair also having a second key; decrypting the signature using the second key of the cryptosystem pair; and comparing the decrypted signature with the digitized image to thereby authenticate the object.
Claim 10
Independent Claim
87 words
A method for authenticating an object identified by a data string, the data string being stored on a storage media and including at least a digitized image of the object, comprising the steps of: receiving the storage media and generating a signature of the data string using a first key of a cryptosystem pair, the cryptosystem pair also having a second key; decrypting the signature using the second key of the cryptosystem pair; and comparing the decrypted signature with the digitized image to thereby authenticate the object.
Claim 11
Dependent Claim
30 words
The method as described in claim 8 wherein the cryptosystem is a public-key cryptosystem and the first key is a private key and the second key is a public key.
References Cited (Backward Citations)
US4016405A
Cited
US4001550A
Cited
US4001550B1
Cited
US4749982A
Cited
US4694397A
Cited
US4748320A
Cited
US4882473A
Cited
US4995081A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-09-26 | 1998-03-28 | 1998-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-09-26 | 2002-03-28 | 2002-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-09-26 | 2006-03-28 | 2006-09-27 | $7700.00 | Window Closed / Lapsed |