Join
today

Boliven PRO is more than just patent search

  • Build and save lists using the powerful Lists feature
  • Analyze and download your search results
  • Share patent search results with your clients

Patents »

US5311595: Method of transferring data, between computer systems using electronic cards

Share

Filing Information

Inventor(s) J rgen Bjerrum · Steen Ottosen · Kj r; Nielsen; Sven ·
Assignee(s) Kommunedata I/S ·
Attorney/Agent(s) Merchant & Gould, Smith, Edell, Welter & Schmidt ·
Primary Examiner Salvatore Cangialosi ·
Application Number US7772372
Filing date 11/05/1991
PCT 371 date 11/05/1991
Issue date 05/10/1994
Predicted expiration date 11/05/2011
U.S. Classifications 380/25  · 380/23  ·
International Classifications H04C 912  ·
Kind CodeA
International Classifications 38023;25 ·
PCT Application Number PCTDK9000141 - 06/07/1990
PCT Publication Number WO199015490 - 12/13/1990
Foreign Priority DK279089 - 06/07/1989 ·
33 Claims, No Drawings


Abstract

When transferring data, an electronic document or the like from a first computer system (100) to a second computer system (200) via a data transmission line (300), e.g. a public data transmission line, a first output and input station (122) comprising a first electronic card (124) and a second output and input station (222) comprising a second electronic card (224) are used. The data is transferred to the first electronic card (124) from the first computer system (100) via the first station (122) and is encrypted in the first electronic card (124), whereupon the data is output from the first electronic card (124) in encrypted form and transferred via the first station (122) to the first computer system (100) and therefrom to the data transmission line (300). The data is received by the other computer system (200) in encrypted form and is transferred to the second electronic card (224) via the second station (222), whereupon the data is decrypted in the second electronic card (224) and is output from the second electronic card via the second station (222) to the second computer system (200). As the data transfer between the first and the second computer system is carried out between the first and the second electronic card, no third parties have neither authorized or unauthorized possibility of interfering with the data transmission and possibly changing the data or the electronic document. The first and second electronic card (124, 224) constitute a coherent set of cards comprising coherent encryption/decryption keys input into the internal storages of the cards.

Independent Claims | See all claims (33)

  1. 1. A method of transferring data from a first computer system to a second computer system via a data transmission line by use of a coherent set of electronic cards, wherein for said transfera first station is used for outputting data from and inputting data into a first electronic card, said first station being connected to and communicating with said first computer system and furthermore being connected to said data transmission line via said first computer system and interfacing means, anda second station is used for outputting data from and inputting data into a second electronic card, said second station being connected to and communicating with said second computer system and furthermore being connected to said data transmission line via this second computer system and interfacing means,said first and second electronic card each comprising a central data processing unit, an internal storage means, an input/output gate for communication with said corresponding station as well as an encryption/decryption means and together constituting the coherent set of electronic cards comprising coherent encryption and decryption keys input into said internal storages of said cards in such a way that the cards are able to communicate with each other and encrypt and decrypt data transferred from the first card to the second card and vice versa, said method comprising the steps of:transferring said data to said first electronic card from said first computer system via said first station and said input/output gate of said first electronic card, and inputting and temporarily storing said data in said internal storage of said first electronic card,outputting said data from said internal storage of said first electronic card and encrypting said data in said first electronic card by means of said encryption/decryption means of said first electronic card and said encryption key(s) stored in said internal storage of said first electronic card,outputting said data from said first electronic card in encrypted form via said input/output gate of said first electronic card and transferring said encrypted data via said first station to said first computer system and therefrom via said interfacing means of said first computer system to said data transmission line,receiving said data by said second computer system in encrypted form via said interfacing means of said second computer system, transferring said encrypted data to said second electronic card via said second station and via said input/output gate of said second electronic card, and inputting and temporarily storing said data in said internal storage of said second electronic card,outputting said data from said internal storage of said second electronic card in encrypted form and decrypting said data in said second electronic card by means of said encryption/decryption means of said second electronic card and said decryption key(s) stored in said internal storage of said second electronic card, andoutputting said data from said second electronic card in encrypted form via said input/output gate of said second electronic card and via said second station to said second computer system.

References Cited

U.S. Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
US4176246 Anstalt Europaische Handelsgesellschaft Gaetzli Nov 1979
US4467139 Compagnie Internationale pour l'Informatique Cii Honeywell Bull Mollier Aug 1984
US4549075 Cii Honeywell Bull (Societe Anonyme) Saada et al. Oct 1985
US4656474 Compagnie Internationale pour l'Informatique Cii-Honeywell Bull (Societe Anonyme) Mollier et al. Apr 1987
US4677670 HENDERSON JR PAUL B Henderson, Jr. Jun 1987
US4807288 C.I.I. Honeywell Bull Ugon et al. Feb 1989
US4823388 Kabushiki Kaisha Toshiba Mizutani et al. Apr 1989
US4882779 Pengeinstitutternes Kobe - og Kreditkortaktieselskab Rahtgen Nov 1989
US4907272 Bull CP8 Hazarb et al. Mar 1990
US4910773 CII Honeywell Bull (Societe Anonyme) Hazard et al. Mar 1990
US4926480 CHAUM DAVID Chaum Mar 1990
US4935962 NCR Corporation Austin Jun 1990
US4974193 Siemens Aktiengesellschaft Beutelspacher et al. Nov 1990
US4989244 Aisin Seiki Kabushiki Kaisha Naruse et al. Jan 1991

Foreign Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
EP0114368KABUSHIKI KAISHA TOSHIBAAug 1984
EP0147716ANT Nachrichtentechnik GmbHJul 1985
EP0194839KABUSHIKI KAISHA TOSHIBASep 1986
EP0277247KABUSHIKI KAISYA ADVANCEAug 1988
EP0285520BULL CP8Oct 1988
EP0396894International Business MachinesNov 1990
EP166541Mar 1991
DE3631797SIEMENS AGMar 1988
FR2526977CII HONEYWELL BULLJun 1988
GB1399020IBMJun 1975

Other Publications

Smart Credit Cards: the answer to cashless shopping; IEEE Spectrum Feb. 1984, pp. 43-49.

Referenced By

Document NumberAssigneeInventorsIssue/Pub Date
GB2294612 MOTOROLA INC SCHELLINGER MICHAEL J May 1996
GB2325378 MOTOROLA INC SCHELLINGER MICHAEL J Nov 1998
EP1178386 FUJITSU LIMITED Ryota Akiyama et al. Feb 2002
EP0727746 FUJITSU LIMITED Akiyama, Ryota, et al. May 2002
US5488649 Motorola, Inc. Michael J. Schellinger Jan 1996
US5544255 Peripheral Vision Limited Smithies; Christopher P. K. et al. Aug 1996
US5745571 Telstra Corporation Limited Edward Andrew Zuk Apr 1998
US5420922 Nybo Seal System AB Leif Lundblad et al. May 1995
US6144955 Ltd. Hitachi Kazuyasu Tsuiki et al. Nov 2000
US6112985 Siemens Aktiengesellschaft Markus Weinlaender Sep 2000
US6296183 Qwest Communications Intl., Inc. Theresa A. Clark Oct 2001
US5647017 Peripheral Vision Ltd. Christopher Paul Kenneth Smithies et al. Jul 1997
US5737418 International Game Technology Ali M. Saffari et al. Apr 1998
US5825875 CP8 Transac Michel Ugon Oct 1998
US6091835 PenOp Limited Smithies; Christopher P. K. et al. Jul 2000
US5577241 Excite, Inc. Graham Spencer Nov 1996
US6188309 AT&T Corp Ronald M. Levine Feb 2001
US6064751 PenOp Limited Christopher Paul Kenneth Smithies et al. May 2000
US6279031 Hitachi, Ltd. Ariko Kawasaki et al. Aug 2001
US5535188 International Business Machines Corporation Chi H. Dang et al. Jul 1996
US5767847 Ltd. Hitachi Yuichi Mori et al. Jun 1998
US5848248 Ltd. Hitachi Ariko Kawasaki et al. Dec 1998
US5940829 Ltd. Hitachi Kazuyasu Tsuiki et al. Aug 1999
US6330624 International Business Machines Corporation Daryl Carvis Cromer et al. Dec 2001
US5933854 Mitsubishi Denki Kabushiki Kaisha Yoshimasa Yoshimura Aug 1999
US5818955 PenOp Limited Christopher Paul Kenneth Smithies et al. Oct 1998
US5905882 Sony Corporation Yasuhiko Sakagami et al. May 1999
US5455941 Canon Kabushiki Kaisha Yasuhiro Okuno et al. Oct 1995
US5606609 Scientific-Atlanta Peter B. Houser et al. Feb 1997
US6502087 Hitachi, Ltd. Kazuyasu Tsuiki et al. Dec 2002
US6516328 Hitachi, Ltd. Yuichi Mori et al. Feb 2003
US7111005 Oracle International Corporation Richard R. Wessman Sep 2006
US7509292 Silverbrook Research Pty Ltd Simon Robert Walmsley Mar 2009
US6385723 Mondex International Limited Timothy Philip Richards May 2002
US6526425 Hitachi, Ltd. Yuichi Mori et al. Feb 2003
US6636970 Fujitsu Limited Ryota Akiyama et al. Oct 2003
US7526555 Toshiba Corporation Amir Shahindoust Apr 2009
US6467049 Cisco Technology, Inc. Kristen Marie Robins et al. Oct 2002
US6367011 Visa International Service Association Alson Lee et al. Apr 2002
US7095851 Tecsec, Inc. Edward M. Scheidt Aug 2006
US7246098 Silverbrook Research Pty Ltd Simon Robert Walmsley Jul 2007
US6381344 Communication Intelligence Corp. Christopher Paul Kenneth Smithies et al. Apr 2002
US6831982 Storage Technology Corporation James Prescott Hughes et al. Dec 2004
US7366702 iPass Inc. Sancho Enrique David Apr 2008
US7346586 Silverbrook Research Pty Ltd Simon Robert Walmsley Mar 2008
US6581162 Compaq Information Technologies Group, L.P. Michael F. Angelo et al. Jun 2003
US7206847 Motorola Inc. William P. Alberth, Jr. et al. Apr 2007
US7606879 Cisco Technology, Inc. Richard W. Pratt Oct 2009
US7249108 Silverbrook Research Pty Ltd Simon Robert Walmsley et al. Jul 2007
US7885899 iPass Inc. Enrique David Sancho Feb 2011
US7743409 SanDisk Corporation Carlos J. Gonzalez et al. Jun 2010
US7743262 Silverbrook Research Pty Ltd Simon Robert Walmsley Jun 2010
US7748031 SanDisk Corporation Carlos J. Gonzalez et al. Jun 2010
US7747541 Silverbrook Research Pty Ltd Simon Robert Walmsley et al. Jun 2010
US6622162 Hitachi, Ltd. Ariko Kawasaki et al. Sep 2003
US7043537 Cisco Technology, Inc Richard W. Pratt May 2006
US7536540 SanDisk Corporation Michael Holtzman et al. May 2009
US7925891 Via Technologies, Inc. Thomas A. Crispin et al. Apr 2011
US7934049 SanDisk Corporation Micky Holtzman et al. Apr 2011
US7991699 Silverbrook Research Pty Ltd Simon Robert Walmsley Aug 2011
US8108691 SanDisk Technologies Inc. Micky Holtzman et al. Jan 2012
US8229844 Fraud Control Systems.com Corporation David Felger Jul 2012
US8220039 SanDisk Technologies Inc. Carlos J. Gonzalez et al. Jul 2012
US8190513 Fraud Control Systems.com Corporation David Felger May 2012
US8301300 Card Technology Corporation David R. Tushie et al. Oct 2012
US8306919 Ken Sakamura Ken Sakamura et al. Nov 2012
US8321686 SanDisk Technologies Inc. Micky Holtzman et al. Nov 2012
US8370260 --
US8423794 --
US8423788 --
US8630942 --