Patent US5748738A successfully refreshed from Google Patents.
US5748738A
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US
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System and method for electronic transmission, storage and retrieval of authenticated documents
Assignee: Document Authentication Systems Inc
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Filing: 1995-09-15
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Granted: 1998-05-05
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Expires: 2015-09-15
Abstract
Abstract Methods and apparatus are provided that implement digital signing and/or encryption for the electronic transmission, storage, and retrieval of authenticated documents and that enable the establishment of the identity of the originator of an electronic document and of the integrity of the information contained in such a document. Together these provide irrevocable proof of authenticity of the document. The methods and apparatus make it possible to provide "paper-less" commercial transactions, such as real-estate transactions and the financial transactions secured by real estate. A Certification Authority provides tools for initializing and managing the cryptographic material required to sign and seal electronic documents. An Authentication Center provides "third party" verification that a document is executed and transmitted by the document's originator. The methods and apparatus eliminate the need for "hard copies" of original documents as well as hard-copy storage. Retrieval of an authenticated document from the Authentication Center may be done by any number of authorized parties at any time by on-line capability.
Inventors
- 👤 Stephen F. Bisbee
- 👤 Jack J. Moskowitz
- 👤 Edward R. Sheehan
- 👤 Douglas H. Trotter
- 👤 Michael W. White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:09
CPC Classifications
H; H04; H04L; H04L9/00; G; G06; G06Q; G06Q20/00; G06Q20/02; G06Q20/38; G06Q20/389; G07; G07F; G07F7/00; G07F7/08; G07F7/12; G07F7/122; H04L9/32; H04L9/3236; H04L9/3247; H04L9/3263; H04L2209/00; H04L2209/56; Y; Y04; Y04S; Y04S40/00; Y04S40/20
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
148 words
A method of authenticating an electronic document, comprising the steps of: signing the electronic document with a digital signature of a transfer agent; appending a certificate to the electronic document by the transfer agent, wherein the certificate relates a cryptographic key to an identity of the transfer agent; applying a date stamp and a time stamp to the electronic document; validating the digital signature and certificate of the transfer agent; signing the electronic document with a second digital signature and appending a second certificate to the electronic document signed with the second digital signature after the digital signature has been validated, wherein the second certificate relates a cryptographic key to the second digital signature; and storing in a facility identified by the second digital signature, the document signed with the second digital signature and having the second certificate appended such that the facility assumes control of the document.
Claim 2
Independent Claim
148 words
A method of authenticating an electronic document, comprising the steps of: signing the electronic document with a digital signature of a transfer agent; appending a certificate to the electronic document by the transfer agent, wherein the certificate relates a cryptographic key to an identity of the transfer agent; applying a date stamp and a time stamp to the electronic document; validating the digital signature and certificate of the transfer agent; signing the electronic document with a second digital signature and appending a second certificate to the electronic document signed with the second digital signature after the digital signature has been validated, wherein the second certificate relates a cryptographic key to the second digital signature; and storing in a facility identified by the second digital signature, the document signed with the second digital signature and having the second certificate appended such that the facility assumes control of the document.
Claim 3
Independent Claim
152 words
An apparatus for authenticating an electronic document, comprising: means for signing the electronic document with a digital signature of a transfer agent; means for appending a certificate to the electronic document, wherein the certificate relates a cryptographic key to an identity of the transfer agent; means for applying a date stamp and a time stamp to the electronic document; means for validating the digital signature and certificate; means for signing the electronic document with a second digital signature and for appending a second certificate to the electronic document signed with the second digital signature after the digital signature has been validated by the validating means, wherein the second certificate relates a cryptographic key to the second digital signature; and means, identified by the second digital signature, for storing the document signed with the second digital signature and having the second certificate appended such that the storing means assumes control of the document.
Claim 4
Independent Claim
152 words
An apparatus for authenticating an electronic document, comprising: means for signing the electronic document with a digital signature of a transfer agent; means for appending a certificate to the electronic document, wherein the certificate relates a cryptographic key to an identity of the transfer agent; means for applying a date stamp and a time stamp to the electronic document; means for validating the digital signature and certificate; means for signing the electronic document with a second digital signature and for appending a second certificate to the electronic document signed with the second digital signature after the digital signature has been validated by the validating means, wherein the second certificate relates a cryptographic key to the second digital signature; and means, identified by the second digital signature, for storing the document signed with the second digital signature and having the second certificate appended such that the storing means assumes control of the document.
Claim 5
Independent Claim
216 words
A method of executing a transaction by transferring an authenticated information object having a verifiable evidence trail, comprising the steps of: signing, by a first entity, the information object with a first digital signature; appending, by the first entity, a first certificate to the information object, wherein the first certificate relates at least an identity and a cryptographic key to the first entity; authenticating the information object signed with the first digital signature and having appended the first certificate by a second entity, thereby forming an authenticated object, wherein the step of authenticating comprises: validating the first digital signature and first certificate; applying a date stamp and a time stamp to the information object signed with the first digital signature and having appended the first certificate; and after the validating and applying steps, taking control of the validated stamped information object by signing the information object with a second digital signature of the second entity, appending a second certificate to the information object, and storing the validated stamped information object signed with the second digital signature and having the second certificate appended as the authenticated object, wherein the second certificate relates at least an identity and a cryptographic key to the second entity; and transferring the authenticated object to an entity in response to an instruction.
Claim 6
Independent Claim
216 words
A method of executing a transaction by transferring an authenticated information object having a verifiable evidence trail, comprising the steps of: signing, by a first entity, the information object with a first digital signature; appending, by the first entity, a first certificate to the information object, wherein the first certificate relates at least an identity and a cryptographic key to the first entity; authenticating the information object signed with the first digital signature and having appended the first certificate by a second entity, thereby forming an authenticated object, wherein the step of authenticating comprises: validating the first digital signature and first certificate; applying a date stamp and a time stamp to the information object signed with the first digital signature and having appended the first certificate; and after the validating and applying steps, taking control of the validated stamped information object by signing the information object with a second digital signature of the second entity, appending a second certificate to the information object, and storing the validated stamped information object signed with the second digital signature and having the second certificate appended as the authenticated object, wherein the second certificate relates at least an identity and a cryptographic key to the second entity; and transferring the authenticated object to an entity in response to an instruction.
Claim 7
Dependent Claim
29 words
The method of claim 3, wherein the transferring step comprises retrieving the stored authenticated object and providing the retrieved authenticated object to the entity in accordance with the instruction.
Claim 8
Dependent Claim
24 words
The method of claim 4, wherein the retrieved authenticated object is provided to each of a plurality of entities in accordance with the instruction.
Claim 9
Dependent Claim
52 words
The method of claim 3, wherein each signing step comprises the steps of applying a hash function to the information object to determine a message digest and using the message digest with a secret cryptographic key of the respective one of the first and second entities to determine the respective digital signature.
Claim 10
Dependent Claim
41 words
The method of claim 6, wherein the validating step comprises the step of using the digital signature with a public cryptographic key of the first entity, and with another message digest determined by applying the hash function to the information object.
Claim 11
Dependent Claim
32 words
The method of claim 3, further comprising the step of maintaining a log relating to the authenticated object so as to identify at least one subsequent information object related to the transaction.
Claim 12
Dependent Claim
21 words
The method of claim 8, wherein a subsequent information object is signed by a third digital signature of a third entity.
Claim 13
Independent Claim
233 words
An apparatus for executing a transaction by transferring an authenticated information object having a verifiable evidence trail, comprising: first means for signing, by a first entity, the information object with a first digital signature and for appending, by the first entity, a first certificate to the information object, wherein the first certificate relates at least an identity and a cryptographic key to the first entity; and means for authenticating an information object signed with the first digital signature and having appended the first certificate by a second entity, thereby forming an authenticated object, wherein the authenticating means comprises: means for validating the first digital signature and first certificate; a date stamp and a time stamp for application to an information object signed with the first digital signature and having appended the first certificate; and means for controlling a validated stamped information object, wherein the controlling means comprises second means for signing an information object with a second digital signature of the second entity and for appending a second certificate to the information object, and a memory; wherein the memory includes storage locations for validated stamped information objects signed with the second digital signature and having the second certificate appended as authenticated objects, an authenticated object stored in the memory is transferrable in response to an instruction, and the second certificate relates at least an identity and a cryptographic key to the second entity.
Claim 14
Independent Claim
233 words
An apparatus for executing a transaction by transferring an authenticated information object having a verifiable evidence trail, comprising: first means for signing, by a first entity, the information object with a first digital signature and for appending, by the first entity, a first certificate to the information object, wherein the first certificate relates at least an identity and a cryptographic key to the first entity; and means for authenticating an information object signed with the first digital signature and having appended the first certificate by a second entity, thereby forming an authenticated object, wherein the authenticating means comprises: means for validating the first digital signature and first certificate; a date stamp and a time stamp for application to an information object signed with the first digital signature and having appended the first certificate; and means for controlling a validated stamped information object, wherein the controlling means comprises second means for signing an information object with a second digital signature of the second entity and for appending a second certificate to the information object, and a memory; wherein the memory includes storage locations for validated stamped information objects signed with the second digital signature and having the second certificate appended as authenticated objects, an authenticated object stored in the memory is transferrable in response to an instruction, and the second certificate relates at least an identity and a cryptographic key to the second entity.
Claim 15
Dependent Claim
53 words
The apparatus of claim 10, wherein each signing means comprises a processor for applying a hash function to the information object to determine a message digest and for using the message digest with a secret cryptographic key of the respective one of the first and second entities to determine the respective digital signature.
Claim 16
Dependent Claim
14 words
The apparatus of claim 11, wherein the signing means is an electronic circuit card.
Claim 17
Dependent Claim
41 words
The apparatus of claim 11, wherein the validating means comprises a processor for using the digital signature with a public cryptographic key of the first entity, and with another message digest determined by applying the hash function to the information object.
Claim 18
Dependent Claim
39 words
The apparatus of claim 10, wherein an authenticated object is transferred in response to the instruction by retrieving the authenticated object from the memory a plurality of times and providing the retrieved authenticated objects to a plurality of entities.
Claim 19
Dependent Claim
34 words
The apparatus of claim 10, wherein the authenticating means further comprises a log relating to authenticated objects and identifying at least one subsequent information object related to the transaction and stored in the memory.
Claim 20
Dependent Claim
21 words
The apparatus of claim 15, wherein a subsequent information object is signed by a third digital signature of a third entity.
References Cited (Backward Citations)
US4200770A
Cited
US4405829A
Cited
US4625076A
Cited
US4853961A
Cited
US4893338A
Cited
US5005200A
Cited
US4995082A
Cited
US5163091A
Cited
US4981370A
Cited
US5323146A
Cited
US5214703A
Cited
US5136647A
Cited
USRE34954E
Cited
US5191613A
Cited
US5136646A
Cited
US5231668A
Cited
US5164988A
Cited
US5390247A
Cited
US5276737A
Cited
US5315658A
Cited
US5276737B1
Cited
US5315658B1
Cited
US5534855A
Cited
US5524073A
Cited
US5339361A
Cited
US5373561A
Cited
US5555307A
Cited
US5363448A
Cited
US5377270A
Cited
US5371794A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-05-04 | 2001-11-03 | 2002-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-05-04 | 2005-11-03 | 2006-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-05-04 | 2009-11-03 | 2010-05-05 | $7700.00 | Window Closed / Lapsed |