US Patent RE41960 Method and apparatus for verifying secure document timestamping
Patent RE41960 was granted and assigned to Walker Digital on November, 2010 by the United States Patent and Trademark Office.
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Patent abstract
According to one embodiment of the invention, a method is provided for receiving a timestamp from a caller via a telephone connection; receiving a device identifier from the caller, in which the device identifier identifies a device; determining a cryptographic key based on the device identifier; determining an indication of a time based on the timestamp and the cryptographic key; providing the indication of the time to the caller; determining an account; and charging a fee to the account.
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Patent Inventor Names
Bruce Schneier0
Dean P. Alderucci0
James A. Jorasch0
Jay S. Walker0
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US Patent RE041960 Method and apparatus for verifying secure document timestamping US Patent RE41960 Method and apparatus for verifying secure document timestamping
Infobox
Patent Number
RE04196000
Patent Number
RE4196000
Edits on 29 Apr, 2023
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Infobox
Is a
Current Assignee
Patent Jurisdiction
Patent Number
RE0419600
Date of Patent
November 23, 2010
0Patent Application Number
112937900
Date Filed
December 2, 2005
0Official Website
Patent Primary Examiner
Edits on 23 Sep, 2022
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Infobox
Is a
Current Assignee
Patent Jurisdiction
Patent Number
RE0419600
Date of Patent
November 23, 2010
0Patent Application Number
112937900
Date Filed
December 2, 2005
0Official Website
Patent Primary Examiner
Edits on 3 Jun, 2022
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US Patent RE041960 Method and apparatus for verifying secure document timestamping
Infobox
Is a
Current assignee
Patent jurisdiction
Patent number
RE041960
Date of patent
November 23, 2010
Patent application number
11293790
Date Filed
December 2, 2005
Patent primary examiner
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