WO2002030041A3 - Electronically verified digital signature and document delivery system and method - Google Patents

Electronically verified digital signature and document delivery system and method Download PDF

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Publication number
WO2002030041A3
WO2002030041A3 PCT/US2001/030957 US0130957W WO0230041A3 WO 2002030041 A3 WO2002030041 A3 WO 2002030041A3 US 0130957 W US0130957 W US 0130957W WO 0230041 A3 WO0230041 A3 WO 0230041A3
Authority
WO
WIPO (PCT)
Prior art keywords
encrypted
document
message
verify
existence
Prior art date
Application number
PCT/US2001/030957
Other languages
French (fr)
Other versions
WO2002030041A2 (en
Inventor
Thaddeus Bouchard
Glenn Benson
Original Assignee
Omtool Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Omtool Ltd filed Critical Omtool Ltd
Priority to AU2002221266A priority Critical patent/AU2002221266A1/en
Publication of WO2002030041A2 publication Critical patent/WO2002030041A2/en
Publication of WO2002030041A3 publication Critical patent/WO2002030041A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
    • H04L9/3247—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving digital signatures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
    • H04L9/3297—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving time stamps, e.g. generation of time stamps
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2221/00—Indexing scheme relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F2221/21—Indexing scheme relating to G06F21/00 and subgroups addressing additional information or applications relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F2221/2151—Time stamp
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/56—Financial cryptography, e.g. electronic payment or e-cash
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/60—Digital content management, e.g. content distribution

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Information Transfer Between Computers (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Storage Device Security (AREA)

Abstract

The secure messaging system of the invention encrypts an electronic document using a symmetric key and transmits the encrypted document and related message parameters to a recipient whose identity is then authenticated by a web server. The web server dynamically regenerates the symmetric key from a hidden key and from the message parameters accompanying the encrypted document, and thus avoids having to maintain a central repository of encrypted documents as required by typical 'post and pick-up' encrypted messaging systems. Further, an audit trail produced while practicing the invention provides timestamped message digest data for a plurality of time intervals, where the message digests for adjacent time intervals are computationally linked together. The audit trail effectively enables timestamped message digest data to verify not only the existence of a document during a first time interval, but also to verify the existence of documents encountered in a prior time interval.
PCT/US2001/030957 2000-10-03 2001-10-03 Electronically verified digital signature and document delivery system and method WO2002030041A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002221266A AU2002221266A1 (en) 2000-10-03 2001-10-03 Electronically verified digital signature and document delivery system and method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US23743300P 2000-10-03 2000-10-03
US60/237,433 2000-10-03

Publications (2)

Publication Number Publication Date
WO2002030041A2 WO2002030041A2 (en) 2002-04-11
WO2002030041A3 true WO2002030041A3 (en) 2002-10-31

Family

ID=22893680

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/030957 WO2002030041A2 (en) 2000-10-03 2001-10-03 Electronically verified digital signature and document delivery system and method

Country Status (3)

Country Link
US (1) US7082538B2 (en)
AU (1) AU2002221266A1 (en)
WO (1) WO2002030041A2 (en)

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Also Published As

Publication number Publication date
US20020091928A1 (en) 2002-07-11
AU2002221266A1 (en) 2002-04-15
US7082538B2 (en) 2006-07-25
WO2002030041A2 (en) 2002-04-11

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