US Patent No: 5,991,405

Number of patents in Portfolio can not be more than 2000

Method for dynamically updating cellular phone unique encryption keys

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

In a method for dynamically updating a cellular-phone-unique-encryption key previously stored in, and common to, each of a cellular phone and an associated home location register (HLR) for providing security in a cellular-phone-network operation, a random number and shared secret random data generated at least partly based on the random number are transmitted and verified between the cellular phone and the associated HLR. A previously stored version of the cellular-phone-unique-encryption key is then dynamically updated in both the cellular phone and in the HLR by independent calculations based on an algorithm using the shared secret random data and the previously stored version of the cellular-phone-unique-encryption key. In this manner, the cellular-phone-unique-encryption key is dynamically updated as desired, e.g., each time a user initiates a call, and the latest version of the cellular-phone-unique-encryption key independently calculated by the cellular phone and the HLR is not transmitted during the updating process, thereby substantially eliminating the possibility of the latest version of the cellular-phone-unique-encryption key being intercepted during transmission by unauthorized parties.

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

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddressTotal Patents
DSC TELECOM L.P.PLANO, TX14

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Mills, Kevin M Austin, TX 4 119

Cited Art Landscape

Patent Info (Count) # Cites Year
 
MOTOROLA MOBILITY LLC (1)
* 5,404,404 Method for updating encryption key information in communication units 63 1993
 
Other [Check patent profile for assignment information] (1)
* 5,655,004 Method and apparatus for detection of cellular phone fraud 25 1995
 
LUCENT TECHNOLOGIES INC. (1)
* 5,204,902 Cellular telephony authentication arrangement 123 1991
 
TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) (1)
* 5,490,201 Method in conjunction with updating one or more HLR-databases included in a mobile telephone system 39 1993
 
Sony Electronics Inc. (1)
* 5,513,245 Automatic generation of private authentication key for wireless communication systems 72 1994
 
Mita Industrial Co., Ltd. (1)
* 5,586,185 Communications system capable of communicating encrypted information 24 1995
 
MOTOROLA, INC. (1)
* 5,146,498 Remote key manipulations for over-the-air re-keying 40 1991
 
MOTOROLA SOLUTIONS, INC. (1)
* 5,325,432 Method for updating encryption key information in communication units 131 1993
 
The Exchange System Limited Partnership (1)
* 5,123,047 Method of updating encryption device monitor code in a multichannel data encryption system 14 1991
 
NEC CORPORATION (1)
* 5,613,214 Mobile communication terminal authenticating system 34 1994
 
FRANCE TELECOM (1)
* 5,661,806 Process of combined authentication of a telecommunication terminal and of a user module 125 1995
 
LG ELECTRONICS INC. (1)
* 5,680,457 System for updating an authorization memory 25 1995
 
CROWLEY, JOHN J. (1)
* 5,375,169 Cryptographic key management method and apparatus 123 1993
 
MCAFEE, INC. (1)
* 5,499,297 System and method for trusted path communications 132 1994
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
HELLA KGAA (2)
* 8,923,514 Apparatus and method for authentication for motor vehicles 0 2011
* 2012/0045,058 APPARATUS AND METHOD FOR AUTHENTICATION FOR MOTOR VEHICLES 1 2011
 
QUALCOMM INCORPORATED (7)
7,591,020 Location based security modification system and method 18 2002
* 2003/0140,246 Location based security modification system and method 74 2002
RE43070 Identifying and locating lost or stolen personal digital assistant devices via a landline- or wireless-connected web server 2 2006
8,135,798 Over-the-air device services and management 5 2006
* 2008/0114,855 OVER-THE-AIR DEVICE SERVICES AND MANAGEMENT 8 2006
8,086,695 Over the air services for mobile devices 1 2009
8,903,945 Over the air services for mobile devices 0 2011
 
KOHLER CO. (1)
7,669,577 Gerotor and method of assembling the same 0 2008
 
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (1)
* 2007/0157,319 Location based security modification system and method 5 2006
 
LENOVO INTERNATIONAL LIMITED (2)
7,934,104 Systems and methods for verifying a licensed installation at time of update 0 2006
* 2007/0174,635 Systems and methods for verifying a licensed installation at time of update 11 2006
 
SAMSUNG ELECTRONICS CO., LTD. (2)
* 7,526,287 Ciphering method in a mobile communication system supporting a multimedia broadcast/multicast service 3 2004
* 2005/0026,607 Ciphering method in a mobile communication system supporting a multimedia broadcast/multicast service 9 2004
 
ERICSSON INC. (1)
* 6,671,377 System and method for downloading network information to mobile stations for location calculation 63 1999
 
NOKIA TECHNOLOGIES OY (2)
7,065,340 Arranging authentication and ciphering in mobile communication system 34 2000
* RE39589 Security method for transmissions in telecommunication networks 3 2004
 
HUAWEI TECHNOLOGIES CO., LTD. (9)
7,650,139 Method for ensuring security of subscriber card 0 2006
* 2007/0105,530 Method for Ensuring Security of Subscriber Card 2 2006
* 8,300,827 Method and apparatus for updating key in an active state 0 2010
* 2010/0202,618 Method and apparatus for updating key in an active state 8 2010
* 8,023,658 Method and apparatus for updating a key in an active state 3 2010
8,144,877 Method and apparatus for updating a key in an active state 16 2011
* 9,031,240 Method and apparatus for updating a key in an active state 0 2012
* 2012/0307,803 METHOD AND APPARATUS FOR UPDATING A KEY IN AN ACTIVE STATE 2 2012
* 2015/0208,240 METHOD AND APPARATUS FOR UPDATING A KEY IN AN ACTIVE STATE 0 2015
 
NOKIA SIEMENS NETWORKS GMBH & CO. KG (2)
* 7,526,273 Method and apparatus to counter the rogue shell threat by means of local key derivation 0 2001
* 2004/0102,181 Method and apparatus to counter the rogue shell threat by means of local key derivation 9 2003
 
ALCATEL (1)
* 6,137,885 Method for enabling direct encrypted communication between two terminals of a mobile radio network, and corresponding station and terminal facilities 22 1998
 
mSAFE Ltd. (1)
* 2004/0029,562 System and method for securing communications over cellular networks 6 2002
 
KABUSHIKI KAISHA TOSHIBA (1)
* 2002/0081,994 Communication apparatus, and authentication method of the same 8 2001
 
SYMANTEC CORPORATION (2)
* 8,478,998 Authenticated communication using a shared unpredictable secret 0 2006
* 2007/0192,829 Authenticated communication using a shared unpredictable secret 8 2006
 
LG ELECTRONICS INC. (2)
* 6,839,553 Method of managing mobile station operational parameters 11 2002
* 2002/0102,964 Method of managing mobile station operational parameters 9 2002
 
NOKIA CORPORATION (2)
* 2005/0031,126 Security in communications networks 5 2004
* 2005/0190,920 System in a digital wireless data communication network for arranging end-to-end encryption and corresponding terminal equipment 9 2004
* Cited By Examiner