Electronic notary
April 16, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3890599 System and method for authenticating an electronically transmitted document Crytographic key notarization methods and apparatus Method and apparatus providing registered mail features in an electronic communication system Method and apparatus for computing and implementing error detection check bytes Solid state key for controlling access to computer systems and to computer software and/or for secure communications Reliable document authentication system Method and apparatus for synchronizing generation of separate, free running, time dependent equipment Identification authenticating system Franking system InventorsApplicationNo. 509447 filed on 04/16/1990US Classes:713/178, Time stamp340/5.81, Personal identification380/51Having production of printed copy (e.g., printer, typewriter)ExaminersPrimary: Buczinski, Stephen C.Attorney, Agent or FirmInternational ClassesH04K 001/00H04K 009/00 H04L 009/00 AbstractMethod and apparatus for determining that a first unit of data associated with a first party has not been modified since a specified point in time. A method includes the steps of (a) providing the first unit of data and (b) generating a second unit of data from the first unit of data, the second unit of data being expressive of an information content of the first unit of data. The method further includes a step of (c) generating a time indication for specifying a point in time, the time indication being generated with time generation means having a time is settable by a second party other than the first party. That is, the time generation means is secured and cannot be altered or changed by the first party. The method further includes a step of (d) encrypting the second unit of data and the generated time indication to generate a third unit of data. The method includes as an additional step a step of (e) validating the first unit of data to ensure that the first unit of data has not been modified since the specified point in time. | |
