US Patent No: 6,240,187

Number of patents in Portfolio can not be more than 2000

Key replacement in a public key cryptosystem

1 Status Updates

Stats

ATTORNEY / AGENT: (SPONSORED)
 

Importance

Loading Importance Indicators... loading....

Abstract

Improved key management is provided by a public key replacement apparatus and method for operating over insecure networks. An active public key and the mask of a replacement public key are provided by a key server to nodes where the active key is used to encrypt and verify messages. To replace the active public key with the replacement public key, a key replacement message is sent to the node. The key replacement message contains the replacement public key and contains the mask of the next replacement key. The mask of the replacement public key may be generated by hashing or encrypting. The key replacement message is signed by the active public key and the replacement public key. Nodes are implemented by a computer, a smart card, a stored data card in combination with a publicly accessible node machine, or other apparatus for sending and/or receiving messages. In a particular application, a financial transaction network, nodes are consumer nodes, merchant nodes, or both, and transactions are securely sent over a possible insecure network

Loading the Abstract Image... loading....

First Claim

Related Publications

Loading Related Publications... loading....

Patent Owner(s)

Patent OwnerAddressTotal Patents
VISA INTERNATIONAL SERVICE ASSOCIATIONSAN FRANCISCO, CA169

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Lewis, Tony Hayward, CA 3 280

Cited Art

Patent Info (Count) # Cites Year
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (4)
5,214,698 Method and apparatus for validating entry of cryptographic keys 28 1991
5,164,988 Method to establish and enforce a network cryptographic security policy in a public key cryptosystem 166 1991
5,265,164 Cryptographic facility environment backup/restore and replication in a public key cryptosystem 179 1991
5,469,507 Secure communication and computation in an insecure environment 54 1994
 
VISA INTERNATIONAL SERVICE ASSOCIATION (2)
5,465,206 Electronic bill pay system 606 1993
5,761,306 Key replacement in a public key cryptosystem 184 1996
 
AMERICAN EXPRESS COMPANY (1)
4,453,074 Protection system for intelligent cards 297 1981
 
BELL TELEPHONE LABORATORIES, INCORPORATED (1)
4,578,531 Encryption system key distribution method and apparatus 95 1982
 
BORG-WARNER SECURITY CORPORATION (1)
4,850,018 Security system with enhanced protection against compromising 21 1986
 
BRITISH TECHNOLOGY GROUP LIMITED (1)
4,799,258 Apparatus and methods for granting access to computers 147 1985
 
GENERAL INSTRUMENT CORPORATION (1)
5,144,664 Apparatus and method for upgrading terminals to maintain a secure communication network 133 1990
 
HITACHI, LTD. (1)
5,309,516 Group cipher communication method and group cipher communication system 37 1993
 
INTEL CORPORATION (1)
6,058,478 Apparatus and method for a vetted field upgrade 114 1997
 
KONINKLIJKE KPN N.V. (1)
5,325,434 Method for authenticating communications participants, system for application of the method and first communications participant and second communication participant for application in the system 10 1992
 
MASSACHUSETTS INSTITUTE OF TECHNOLOGY (1)
4,405,829 Cryptographic communications system and method 935 1977
 
MICROSOFT CORPORATION (1)
5,680,458 Root key compromise recovery 38 1995
 
MOTOROLA SOLUTIONS, INC. (1)
5,325,432 Method for updating encryption key information in communication units 111 1993
 
MOTOROLA, INC. (1)
5,208,859 Method for rekeying secure communication units by group 24 1991
 
NEC CORPORATION (1)
5,046,125 Lock control method for on-board terminal equipment of a mobile telecommunications system 26 1990
 
QUINTRAS FOUNDATION AG L.L.C. (1)
5,506,905 Authentication method for keyless entry system 54 1994
 
RCA CORPORATION (1)
4,688,250 Apparatus and method for effecting a key change via a cryptographically protected link 23 1986
 
SIEMENS AKTIENGESELLSCHAFT (1)
5,365,225 Transmitter-receiver system with (re-)initialization 72 1991
 
TANDEM COMPUTERS CORPORATION (1)
4,972,472 Method and apparatus for changing the master key in a cryptographic system 69 1985
 
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE ADMINISTRATOR OF THE NATIONAL AERONAUTICS AND SPACE ADMINISTRATION (1)
5,499,294 Digital camera with apparatus for authentication of images produced from an image file 413 1995
 
VOICE SIGNALS LLC (1)
4,993,067 Secure satellite over-the-air rekeying method and system 31 1988
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (2)
4,926,478 Method and apparatus for continuously acknowledged link encrypting 19 1988
5,956,407 Public key cryptographic system having nested security levels 27 1997

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
XATRA FUND MX, LLC (34)
7,239,226 System and method for payment using radio frequency identification in contact and contactless transactions 55 2002
7,249,112 System and method for assigning a funding source for a radio frequency identification device 44 2002
7,668,750 Securing RF transactions using a transactions counter 0 2004
7,268,667 Systems and methods for providing a RF transaction device operable to store multiple distinct accounts 11 2004
7,268,668 Systems and methods for managing multiple accounts on a RF transaction instrument 9 2004
7,360,689 Method and system for proffering multiple biometrics for use with a FOB 9 2004
7,303,120 System for biometric security using a FOB 43 2004
7,154,375 Biometric safeguard method with a fob 37 2004
7,121,471 Method and system for DNA recognition biometrics on a fob 22 2004
7,059,531 Method and system for smellprint recognition biometrics on a fob 13 2004
7,172,112 Public/private dual card system and method 41 2004
7,639,116 Converting account data associated with a radio frequency device 1 2004
7,119,659 Systems and methods for providing a RF transaction device for use in a private label transaction 38 2004
7,493,288 RF payment via a mobile device 32 2004
7,228,155 System and method for remotely initializing a RF transaction 46 2004
7,705,732 Authenticating an RF transaction using a transaction counter 4 2004
7,312,707 System and method for authenticating a RF transaction using a transaction account routing number 35 2004
7,746,215 RF transactions using a wireless reader grid 1 2005
8,294,552 Facial scan biometrics on a payment device 0 2007
8,074,889 System for biometric security using a fob 2 2007
7,988,038 System for biometric security using a fob 0 2007
7,814,332 Voiceprint biometrics on a payment device 5 2007
7,637,434 Registering a biometric for radio frequency transactions 1 2007
7,578,448 Authorizing radio frequency transactions using a keystroke scan 1 2007
7,506,818 Biometrics for radio frequency payment transactions 8 2007
7,500,616 Authenticating fingerprints for radio frequency payment transactions 5 2007
8,289,136 Hand geometry biometrics on a payment device 0 2007
8,284,025 Method and system for auditory recognition biometrics on a FOB 0 2007
8,279,042 Iris scan biometrics on a payment device 0 2007
7,690,577 Registering a biometric for radio frequency transactions 1 2007
7,506,819 Biometric security using a fob 6 2007
RE43157 System and method for reassociating an account number to another transaction account 1 2008
7,886,157 Hand geometry recognition biometrics on a fob 0 2008
RE43460 Public/private dual card system and method 0 2009
 
AMERICAN EXPRESS TRAVEL RELATED SERVICES COMPANY, INC. (27)
8,429,041 Systems and methods for managing account information lifecycles 0 2003
7,306,158 Clear contactless card 4 2003
7,827,106 System and method for manufacturing a punch-out RFID transaction device 1 2003
7,925,535 System and method for securing RF transactions using a radio frequency identification device including a random number generator 1 2004
7,093,767 System and method for manufacturing a punch-out RFID transaction device 45 2004
7,070,112 Transparent transaction device 40 2004
7,542,942 System and method for securing sensitive information during completion of a transaction 8 2004
7,503,480 Method and system for tracking user performance 4 2004
7,463,133 Systems and methods for providing a RF transaction device operable to store multiple distinct calling card accounts 2 2004
7,835,960 System for facilitating a transaction 5 2004
7,768,379 Method and system for a travel-related multi-function fob 0 2004
7,762,457 System and method for dynamic fob synchronization and personalization 2 2004
7,587,756 Methods and apparatus for a secure proximity integrated circuit card transactions 3 2004
7,805,378 System and method for encoding information in magnetic stripe format for use in radio frequency identification transactions 1 2004
7,996,324 Systems and methods for managing multiple accounts on a RF transaction device using secondary identification indicia 0 2004
7,156,301 Foldable non-traditionally-sized RF transaction card system and method 31 2005
7,429,927 System and method for providing and RFID transaction device 3 2005
7,543,738 System and method for secure transactions manageable by a transaction account provider 11 2005
7,650,314 System and method for securing a recurrent billing transaction 0 2005
8,001,054 System and method for generating an unpredictable number using a seeded algorithm 2 2006
7,837,116 Transaction card 2 2007
7,494,058 Smartcard transaction method and system using voiceprint recognition 4 2007
7,694,876 Method and system for tracking user performance 1 2008
7,793,845 Smartcard transaction system and method 2 2009
8,016,191 Smartcard transaction system and method 3 2010
8,266,056 System and method for manufacturing a punch-out RFID transaction device 0 2010
8,191,788 Transaction card 1 2010
 
SECURITY FIRST CORP. (12)
7,260,724 Context sensitive dynamic authentication in a cryptographic system 41 2000
7,391,865 Secure data parser method and system 23 2003
7,577,621 Cryptographic server with provisions for interoperability between cryptographic systems 3 2004
8,266,438 Secure data parser method and system 0 2005
8,009,830 Secure data parser method and system 4 2006
7,802,104 Context sensitive dynamic authentication in a cryptographic system 6 2007
8,155,322 Systems and methods for distributing and securing data 1 2007
8,135,134 Systems and methods for managing cryptographic keys 1 2008
8,214,650 Context sensitive dynamic authentication in a cryptographic system 2010
8,320,560 Secure data parser method and system 2011
8,271,802 Secure data parser method and system 2012
8,332,638 Secure data parser method and system 0 2012
 
SUN MICROSYSTEMS, INC. (3)
7,016,499 Secure ephemeral decryptability 8 2001
7,409,545 Ephemeral decryption utilizing binding functions 4 2003
7,363,499 Blinded encryption and decryption 3 2003
 
ACTIVCARD IRELAND LIMITED (2)
7,251,828 Flexible method of security data backup 2 2000
7,673,333 Flexible method of security data backup 1 2007
 
GENERAL INSTRUMENT CORPORATION (2)
7,421,083 System for seamlessly updating service keys with automatic recovery 2 2002
8,364,964 Registering client devices with a registration server 0 2009
 
PITNEY BOWES INC. (2)
6,473,743 Postage meter having delayed generation of cryptographic security parameters 15 1999
6,868,407 Postage security device having cryptographic keys with a variable key length 9 2000
 
VISA U.S.A. INC. (2)
7,702,916 Method and system for secure authentication 2 2004
8,359,474 Method and system for secure authentication 0 2010
 
ACTIVCARD (1)
7,085,386 System and method for secure replacement of high level cryptographic keys in a personal security device 13 2001
 
C4 TECHNOLOGY INC. (1)
7,218,733 Encryption method, program for encryption, memory medium for storing the program, and encryption apparatus, as well as decryption method and decryption apparatus 2 2001
 
INSIDE SECURE (1)
7,822,207 Key protection mechanism 1 2006
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (1)
7,499,552 Cipher method and system for verifying a decryption of an encrypted user data key 1 2006
 
LUCENT TECHNOLOGIES INC. (1)
6,529,884 Minimalistic electronic commerce system 4 1999
 
NORTHROP GRUMMAN SYSTEMS CORPORATION (1)
7,421,079 Method and apparatus for secure key replacement 1 2003
 
PAXERA CORP. (1)
6,938,019 Method and apparatus for making secure electronic payments 21 2000
 
SYMANTEC CORPORATION (1)
7,054,447 Method and apparatus for periodically removing invalid public keys from a public key server 3 2000
 
T-MOBILE DEUTSCHLAND GMBH (1)
6,690,930 Process to control a subscriber identity module (SIM) in mobile phone system 79 2000
 
THOMSON LICENSING (1)
7,861,084 Authentication of data transmitted in a digital transmission system 0 2006
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (1)
7,734,527 Method and apparatus for making secure electronic payments 3 2002

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
11.5 Year Payment $7400.00 $3700.00 $1850.00 Nov 29, 2012
Fee Large entity fee small entity fee micro entity fee
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00