CA2173008A1 - Cryptographic Key Management and Validating System - Google Patents

Cryptographic Key Management and Validating System

Info

Publication number
CA2173008A1
CA2173008A1 CA2173008A CA2173008A CA2173008A1 CA 2173008 A1 CA2173008 A1 CA 2173008A1 CA 2173008 A CA2173008 A CA 2173008A CA 2173008 A CA2173008 A CA 2173008A CA 2173008 A1 CA2173008 A1 CA 2173008A1
Authority
CA
Canada
Prior art keywords
key
domain
master
box
keys
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA2173008A
Other languages
French (fr)
Other versions
CA2173008C (en
Inventor
Walter J. Baker
Feliks Bator
Robert A. Cordery
Kevin D. Hunter
Kathryn V. Lawton
Louis J. Loglisci
Steven J. Pauly
Leon A. Pintsov
Frederick W. Ryan, Jr.
Monroe A. Weiant, Jr.
Gary M. Heiden
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pitney Bowes Inc
Original Assignee
Pitney Bowes Inc
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 Pitney Bowes Inc filed Critical Pitney Bowes Inc
Publication of CA2173008A1 publication Critical patent/CA2173008A1/en
Application granted granted Critical
Publication of CA2173008C publication Critical patent/CA2173008C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
    • H04L9/0819—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s)
    • H04L9/083—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) involving central third party, e.g. key distribution center [KDC] or trusted third party [TTP]
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B17/00—Franking apparatus
    • G07B17/00733—Cryptography or similar special procedures in a franking system
    • 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
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
    • H04L9/0819—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s)
    • H04L9/0825—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) using asymmetric-key encryption or public key infrastructure [PKI], e.g. key signature or public key certificates
    • 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
    • H04L9/321—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 a third party or a trusted authority
    • H04L9/3213—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 a third party or a trusted authority using tickets or tokens, e.g. Kerberos
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B17/00—Franking apparatus
    • G07B17/00016—Relations between apparatus, e.g. franking machine at customer or apparatus at post office, in a franking system
    • G07B17/0008—Communication details outside or between apparatus
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B17/00—Franking apparatus
    • G07B17/00733—Cryptography or similar special procedures in a franking system
    • G07B2017/00846—Key management
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B17/00—Franking apparatus
    • G07B17/00733—Cryptography or similar special procedures in a franking system
    • G07B2017/00846—Key management
    • G07B2017/00854—Key generation
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B17/00—Franking apparatus
    • G07B17/00733—Cryptography or similar special procedures in a franking system
    • G07B2017/00846—Key management
    • G07B2017/00862—Key storage, e.g. escrowing by trusted third party
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B17/00—Franking apparatus
    • G07B17/00733—Cryptography or similar special procedures in a franking system
    • G07B2017/00846—Key management
    • G07B2017/0087—Key distribution
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B17/00—Franking apparatus
    • G07B17/00733—Cryptography or similar special procedures in a franking system
    • G07B2017/00846—Key management
    • G07B2017/00895—Key verification, e.g. by using trusted party
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
    • G07B17/00—Franking apparatus
    • G07B17/00733—Cryptography or similar special procedures in a franking system
    • G07B2017/00959—Cryptographic modules, e.g. a PC encryption board
    • G07B2017/00967—PSD [Postal Security Device] as defined by the USPS [US Postal Service]

Abstract

A Key Management System for generating, distributing and managing cryptographic keys used by an information transaction system that employs cryptographic means to produce evidence of information integrity. The system comprises a plurality of functionally distinct secure boxes operatively coupled to each other. Each of the secure boxes performs functions for key generation, key installation, key verification or validation of tokens.
Computers, operatively coupled to the secure boxes, provide system control and facilitate communication among the secure boxes. A plurality of separate logical security domains provide domain processes for key generation, key installation, key verification and validation of tokens produced by the transaction evidencing device within the domain using the key management functions. A plurality of domain archives, corresponding respectively to each of the security domains, securely and reliably record key status records and master keys for each domain. The Key Management System installs the master keys in the transaction evidencing device and validates the tokens. The secure boxes include a key generation box for generating, encrypting and signing a master key; a key installation box for receiving, verifying and decrypting the signed master key and for installing the master key into the transaction evidencing device; a key verification box for verifying the installation of the master key in the transaction evidencing device, a token verification box for verifying the tokens, and at least one manufacturing box for generating domain keys and distributing the domain keys among the secure boxes for each of the domains.
CA002173008A 1995-03-31 1996-03-29 Cryptographic key management and validating system Expired - Fee Related CA2173008C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US41456395A 1995-03-31 1995-03-31
US08/414,563 1995-03-31
US08/553,812 US5812666A (en) 1995-03-31 1995-10-23 Cryptographic key management and validation system
US08/553,812 1995-10-23

Publications (2)

Publication Number Publication Date
CA2173008A1 true CA2173008A1 (en) 1996-10-01
CA2173008C CA2173008C (en) 2000-05-16

Family

ID=27022605

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002173008A Expired - Fee Related CA2173008C (en) 1995-03-31 1996-03-29 Cryptographic key management and validating system

Country Status (7)

Country Link
US (1) US5812666A (en)
EP (1) EP0735722B1 (en)
JP (1) JPH09149021A (en)
CN (1) CN1193314C (en)
BR (1) BR9601231A (en)
CA (1) CA2173008C (en)
DE (1) DE69634220T2 (en)

Families Citing this family (84)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3769804B2 (en) * 1996-02-02 2006-04-26 ソニー株式会社 Decoding method and electronic device
JP3486043B2 (en) * 1996-03-11 2004-01-13 株式会社東芝 Operating method of software distribution system and software system
US5805701A (en) * 1996-11-01 1998-09-08 Pitney Bowes Inc. Enhanced encryption control system for a mail processing system having data center verification
US5812990A (en) 1996-12-23 1998-09-22 Pitney Bowes Inc. System and method for providing an additional cryptography layer for postage meter refills
US5982896A (en) * 1996-12-23 1999-11-09 Pitney Bowes Inc. System and method of verifying cryptographic postage evidencing using a fixed key set
GB9702099D0 (en) * 1997-01-31 1997-03-19 Neopost Ltd Secure communication system
JP4268690B2 (en) * 1997-03-26 2009-05-27 ソニー株式会社 Authentication system and method, and authentication method
US6122631A (en) * 1997-03-28 2000-09-19 International Business Machines Corporation Dynamic server-managed access control for a distributed file system
WO1998057304A1 (en) 1997-06-12 1998-12-17 Pitney Bowes Inc. Virtual postage meter with secure digital signature device
US6567794B1 (en) 1997-06-13 2003-05-20 Pitney Bowes Inc. Method for access control in a virtual postage metering system
US6546377B1 (en) 1997-06-13 2003-04-08 Pitney Bowes Inc. Virtual postage meter with multiple origins of deposit
US7203666B1 (en) 1997-06-13 2007-04-10 Pitney Bowes Inc. Virtual postage metering system
US6466921B1 (en) * 1997-06-13 2002-10-15 Pitney Bowes Inc. Virtual postage meter with secure digital signature device
WO1999026121A2 (en) 1997-11-13 1999-05-27 Hyperspace Communications, Inc. File transfer system
US6393135B1 (en) 1997-12-23 2002-05-21 Pitney Bowes Inc. OLE automation server for manipulation of mail piece data
US6253219B1 (en) 1997-12-23 2001-06-26 Pitney Bowes Inc. Method for utilizing the postal service address as an object in an object oriented environment
US6069616A (en) * 1997-12-30 2000-05-30 Rozum, Jr.; Andrew L. Postal security device with computer keyboard interface
US6233565B1 (en) 1998-02-13 2001-05-15 Saranac Software, Inc. Methods and apparatus for internet based financial transactions with evidence of payment
FR2783337B1 (en) * 1998-09-11 2000-12-15 Neopost Ind METHOD FOR MONITORING THE CONSUMPTION OF POSTAGE MACHINES
CA2347211A1 (en) 1998-10-23 2000-05-04 L-3 Communications Corporation Apparatus and methods for managing key material in heterogeneous cryptographic assets
US6820202B1 (en) 1998-11-09 2004-11-16 First Data Corporation Account authority digital signature (AADS) system
US7047416B2 (en) * 1998-11-09 2006-05-16 First Data Corporation Account-based digital signature (ABDS) system
GB9906293D0 (en) * 1999-03-18 1999-05-12 Post Office Improvements relating to postal services
US6834273B1 (en) * 1999-04-23 2004-12-21 Pitney Bowes Inc. System for capturing information from a postal indicia producing device so as to correct improperly paid mail pieces
GB2353682B (en) * 1999-07-15 2004-03-31 Nds Ltd Key management for content protection
IL130963A (en) * 1999-07-15 2006-04-10 Nds Ltd Key management for content protection
AU7496300A (en) * 1999-09-17 2001-04-17 Ascom Hasler Mailing Systems, Inc. Payment system and method
US6724894B1 (en) * 1999-11-05 2004-04-20 Pitney Bowes Inc. Cryptographic device having reduced vulnerability to side-channel attack and method of operating same
US6473743B1 (en) * 1999-12-28 2002-10-29 Pitney Bowes Inc. Postage meter having delayed generation of cryptographic security parameters
DE10020904B4 (en) 2000-04-28 2004-12-09 Francotyp-Postalia Ag & Co. Kg Procedure for the secure distribution of security modules
WO2001086411A1 (en) * 2000-05-05 2001-11-15 Pitney Bowes Inc. System and method for instant online postage metering
US6934839B1 (en) 2000-06-30 2005-08-23 Stamps.Com Inc. Evidencing and verifying indicia of value using secret key cryptography
US7222236B1 (en) * 2000-06-30 2007-05-22 Stamps.Com Evidencing indicia of value using secret key cryptography
JP2004506245A (en) * 2000-08-04 2004-02-26 ファースト　データ　コーポレイション Linking the device's public key with information during manufacture
US7558965B2 (en) * 2000-08-04 2009-07-07 First Data Corporation Entity authentication in electronic communications by providing verification status of device
US6978369B2 (en) * 2000-08-04 2005-12-20 First Data Corporation Person-centric account-based digital signature system
US6983368B2 (en) * 2000-08-04 2006-01-03 First Data Corporation Linking public key of device to information during manufacture
US7082533B2 (en) * 2000-08-04 2006-07-25 First Data Corporation Gauging risk in electronic communications regarding accounts in ABDS system
US7010691B2 (en) * 2000-08-04 2006-03-07 First Data Corporation ABDS system utilizing security information in authenticating entity access
US7552333B2 (en) * 2000-08-04 2009-06-23 First Data Corporation Trusted authentication digital signature (tads) system
US6789189B2 (en) * 2000-08-04 2004-09-07 First Data Corporation Managing account database in ABDS system
US7096354B2 (en) * 2000-08-04 2006-08-22 First Data Corporation Central key authority database in an ABDS system
DE10051818A1 (en) * 2000-10-18 2002-06-20 Deutsche Post Ag Procedure for checking franking marks applied to mail items
US7536553B2 (en) * 2001-05-10 2009-05-19 Pitney Bowes Inc. Method and system for validating a security marking
EP1276062A1 (en) * 2001-07-12 2003-01-15 Hewlett-Packard Company, A Delaware Corporation A method of providing user-specific data to an information source, a data carrier and a method of personalising a user's internet experience
US20040128508A1 (en) * 2001-08-06 2004-07-01 Wheeler Lynn Henry Method and apparatus for access authentication entity
US7487363B2 (en) * 2001-10-18 2009-02-03 Nokia Corporation System and method for controlled copying and moving of content between devices and domains based on conditional encryption of content key depending on usage
DE10211265A1 (en) * 2002-03-13 2003-10-09 Deutsche Post Ag Method and device for creating verifiable tamper-proof documents
AUPS112202A0 (en) * 2002-03-14 2002-04-18 Commonwealth Scientific And Industrial Research Organisation Semiconductor manufacture
US6988204B2 (en) * 2002-04-16 2006-01-17 Nokia Corporation System and method for key distribution and network connectivity
US7092527B2 (en) * 2002-04-18 2006-08-15 International Business Machines Corporation Method, system and program product for managing a size of a key management block during content distribution
US20040030887A1 (en) * 2002-08-07 2004-02-12 Harrisville-Wolff Carol L. System and method for providing secure communications between clients and service providers
DE10305730B4 (en) * 2003-02-12 2005-04-07 Deutsche Post Ag Method for verifying the validity of digital indicia
CN100454807C (en) * 2003-08-29 2009-01-21 华为技术有限公司 Method for protecting information integrity
US20050102513A1 (en) * 2003-11-10 2005-05-12 Nokia Corporation Enforcing authorized domains with domain membership vouchers
US20060156013A1 (en) * 2005-01-07 2006-07-13 Beeson Curtis L Digital signature software using ephemeral private key and system
US7593527B2 (en) * 2005-01-07 2009-09-22 First Data Corporation Providing digital signature and public key based on shared knowledge
US7869593B2 (en) * 2005-01-07 2011-01-11 First Data Corporation Software for providing based on shared knowledge public keys having same private key
US7936869B2 (en) * 2005-01-07 2011-05-03 First Data Corporation Verifying digital signature based on shared knowledge
US20060153367A1 (en) * 2005-01-07 2006-07-13 Beeson Curtis L Digital signature system based on shared knowledge
US7693277B2 (en) * 2005-01-07 2010-04-06 First Data Corporation Generating digital signatures using ephemeral cryptographic key
US7490239B2 (en) * 2005-01-07 2009-02-10 First Data Corporation Facilitating digital signature based on ephemeral private key
US20060153364A1 (en) * 2005-01-07 2006-07-13 Beeson Curtis L Asymmetric key cryptosystem based on shared knowledge
US20060153370A1 (en) * 2005-01-07 2006-07-13 Beeson Curtis L Generating public-private key pair based on user input data
US20060153369A1 (en) * 2005-01-07 2006-07-13 Beeson Curtis L Providing cryptographic key based on user input data
FR2890218B1 (en) * 2005-08-31 2007-11-09 Neopost Ind Sa DELIVERY SYSTEM WITH DISTRIBUTED ACCOUNTING
US7822206B2 (en) * 2006-10-26 2010-10-26 International Business Machines Corporation Systems and methods for management and auto-generation of encryption keys
US8050410B2 (en) * 2006-12-08 2011-11-01 Uti Limited Partnership Distributed encryption methods and systems
US20080144836A1 (en) * 2006-12-13 2008-06-19 Barry Sanders Distributed encryption authentication methods and systems
US8705744B2 (en) * 2007-04-05 2014-04-22 Koninklijke Philips N.V. Wireless sensor network key distribution
US8006295B2 (en) * 2007-06-28 2011-08-23 Microsoft Corporation Domain ID service
CN101400059B (en) * 2007-09-28 2010-12-08 华为技术有限公司 Cipher key updating method and device under active state
US8214291B2 (en) 2007-10-19 2012-07-03 Ebay Inc. Unified identity verification
US8838503B2 (en) * 2008-12-08 2014-09-16 Ebay Inc. Unified identity verification
US8190906B1 (en) * 2008-12-16 2012-05-29 Emc Corporation Method and apparatus for testing authentication tokens
US8971535B2 (en) 2010-05-27 2015-03-03 Bladelogic, Inc. Multi-level key management
US9026805B2 (en) 2010-12-30 2015-05-05 Microsoft Technology Licensing, Llc Key management using trusted platform modules
US9008316B2 (en) * 2012-03-29 2015-04-14 Microsoft Technology Licensing, Llc Role-based distributed key management
US9003560B1 (en) * 2012-06-05 2015-04-07 Rockwell Collins, Inc. Secure enclosure with internal security components
CN105827397B (en) 2015-01-08 2019-10-18 阿里巴巴集团控股有限公司 Quantum key distribution system, method and device based on credible relaying
JP7228977B2 (en) * 2018-08-30 2023-02-27 キヤノン株式会社 Information processing device, authorization system and verification method
US11132685B1 (en) 2020-04-15 2021-09-28 Capital One Services, Llc Systems and methods for automated identity verification
DE102020003072B3 (en) 2020-05-22 2021-07-15 Daimler Ag Procedure for the secure use of cryptographic material
CN114070640B (en) * 2021-11-25 2024-02-06 航天新通科技有限公司 Secure communication method and system

Family Cites Families (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4227253A (en) * 1977-12-05 1980-10-07 International Business Machines Corporation Cryptographic communication security for multiple domain networks
US4238853A (en) * 1977-12-05 1980-12-09 International Business Machines Corporation Cryptographic communication security for single domain networks
US4281216A (en) * 1979-04-02 1981-07-28 Motorola Inc. Key management for encryption/decryption systems
US4447890A (en) * 1980-07-14 1984-05-08 Pitney Bowes Inc. Remote postage meter systems having variable user authorization code
US4578531A (en) * 1982-06-09 1986-03-25 At&T Bell Laboratories Encryption system key distribution method and apparatus
US4590470A (en) * 1983-07-11 1986-05-20 At&T Bell Laboratories User authentication system employing encryption functions
US4972472A (en) * 1985-03-15 1990-11-20 Tandem Computers Incorporated Method and apparatus for changing the master key in a cryptographic system
US4831555A (en) * 1985-08-06 1989-05-16 Pitney Bowes Inc. Unsecured postage applying system
US4743747A (en) * 1985-08-06 1988-05-10 Pitney Bowes Inc. Postage and mailing information applying system
US4775246A (en) * 1985-04-17 1988-10-04 Pitney Bowes Inc. System for detecting unaccounted for printing in a value printing system
US4757537A (en) * 1985-04-17 1988-07-12 Pitney Bowes Inc. System for detecting unaccounted for printing in a value printing system
US4725718A (en) * 1985-08-06 1988-02-16 Pitney Bowes Inc. Postage and mailing information applying system
US4731840A (en) * 1985-05-06 1988-03-15 The United States Of America As Represented By The United States Department Of Energy Method for encryption and transmission of digital keying data
GB8704920D0 (en) * 1987-03-03 1987-04-08 Hewlett Packard Co Secure messaging system
US4850017A (en) * 1987-05-29 1989-07-18 International Business Machines Corp. Controlled use of cryptographic keys via generating station established control values
US4853961A (en) * 1987-12-18 1989-08-01 Pitney Bowes Inc. Reliable document authentication system
US4873645A (en) * 1987-12-18 1989-10-10 Pitney Bowes, Inc. Secure postage dispensing system
US4888801A (en) * 1988-05-02 1989-12-19 Motorola, Inc. Hierarchical key management system
US4888802A (en) * 1988-06-17 1989-12-19 Ncr Corporation System and method for providing for secure encryptor key management
US4935961A (en) * 1988-07-27 1990-06-19 Gargiulo Joseph L Method and apparatus for the generation and synchronization of cryptographic keys
US5016277A (en) * 1988-12-09 1991-05-14 The Exchange System Limited Partnership Encryption key entry method in a microcomputer-based encryption system
US4965804A (en) * 1989-02-03 1990-10-23 Racal Data Communications Inc. Key management for encrypted packet based networks
US5048087A (en) * 1989-02-03 1991-09-10 Racal Data Communications Inc. Key management for encrypted packet based networks
DE69014361T2 (en) * 1989-03-23 1995-04-27 Neopost Ind Process for increasing the security of an electronic franking machine with remote upgrading.
US4956863A (en) * 1989-04-17 1990-09-11 Trw Inc. Cryptographic method and apparatus for public key exchange with authentication
US5148481A (en) * 1989-10-06 1992-09-15 International Business Machines Corporation Transaction system security method and apparatus
US5029206A (en) * 1989-12-27 1991-07-02 Motorola, Inc. Uniform interface for cryptographic services
US5404403A (en) * 1990-09-17 1995-04-04 Motorola, Inc. Key management in encryption systems
US5173938A (en) * 1990-09-27 1992-12-22 Motorola, Inc. Key management system
US5247576A (en) * 1991-02-27 1993-09-21 Motorola, Inc. Key variable identification method
US5208859A (en) * 1991-03-15 1993-05-04 Motorola, Inc. Method for rekeying secure communication units by group
US5243654A (en) * 1991-03-18 1993-09-07 Pitney Bowes Inc. Metering system with remotely resettable time lockout
US5214698A (en) * 1991-03-20 1993-05-25 International Business Machines Corporation Method and apparatus for validating entry of cryptographic keys
US5200999A (en) * 1991-09-27 1993-04-06 International Business Machines Corporation Public key cryptosystem key management based on control vectors
US5241599A (en) * 1991-10-02 1993-08-31 At&T Bell Laboratories Cryptographic protocol for secure communications
US5179591A (en) * 1991-10-16 1993-01-12 Motorola, Inc. Method for algorithm independent cryptographic key management
US5265164A (en) * 1991-10-31 1993-11-23 International Business Machines Corporation Cryptographic facility environment backup/restore and replication in a public key cryptosystem
US5245658A (en) * 1992-01-06 1993-09-14 George Bush Domain-based encryption
JPH05281906A (en) * 1992-04-02 1993-10-29 Fujitsu Ltd Cipher key common-used system
US5237611A (en) * 1992-07-23 1993-08-17 Crest Industries, Inc. Encryption/decryption apparatus with non-accessible table of keys
US5341426A (en) * 1992-12-15 1994-08-23 Motorola, Inc. Cryptographic key management apparatus and method
US5390251A (en) * 1993-10-08 1995-02-14 Pitney Bowes Inc. Mail processing system including data center verification for mailpieces
US5621795A (en) * 1994-12-27 1997-04-15 Pitney Bowes Inc. System and method for fault tolerant key management

Also Published As

Publication number Publication date
US5812666A (en) 1998-09-22
DE69634220T2 (en) 2005-12-29
CA2173008C (en) 2000-05-16
BR9601231A (en) 1998-01-06
EP0735722A2 (en) 1996-10-02
CN1147656A (en) 1997-04-16
EP0735722A3 (en) 1999-10-06
EP0735722B1 (en) 2005-01-26
JPH09149021A (en) 1997-06-06
DE69634220D1 (en) 2005-03-03
CN1193314C (en) 2005-03-16

Similar Documents

Publication Publication Date Title
CA2173008A1 (en) Cryptographic Key Management and Validating System
CA2298372C (en) Original data circulation method, system, apparatus, and computer readable medium
CA2172860A1 (en) Method of Token Verification in a Key Management System
CA1331640C (en) Document authentication system
EP0422757B1 (en) Public/key date-time notary facility
US4658093A (en) Software distribution system
CN100359519C (en) Method and apparatus for establishing usage rights for digital content to be created in future
US7783887B2 (en) Method and apparatus for providing television services using an authenticating television receiver device
US6334118B1 (en) Software rental system and method for renting software
CA2222662A1 (en) System and method of verifying cryptographic postage evidencing using a fixed key set
US20050195975A1 (en) Digital media distribution cryptography using media ticket smart cards
CA2183274A1 (en) Secure User Certification For Electronic Commerce Employing Value Metering System
US20070168291A1 (en) Electronic negotiable documents
CN101311950A (en) Electronic stamp realization method and device
Denning Secure personal computing in an insecure network
JPH08273011A (en) Method for discrimination of measured account value to digital printer
CA2263131A1 (en) Virtual postage meter with secure digital signature device
GB2297856A (en) Electronic negotiable documents
CA2173018A1 (en) Method of Manufacturing Secure Boxes in a Key Management System
CA2172861A1 (en) Method of Manufacturing Generic Meters in a Key Management System
EP1150256B1 (en) Method for the secure distribution of security modules
EP0808535B1 (en) Electronic negotiable documents
US7895449B2 (en) System and method for securely delivering installation keys to a production facility
GB2211644A (en) Reliable document authentication system
CA2605569C (en) Electronic negotiable documents

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20130402