CA2135913A1 - Continuous Synchronous Encryption and Decryption in a Wireless Communication System Throughout Handoffs - Google Patents

Continuous Synchronous Encryption and Decryption in a Wireless Communication System Throughout Handoffs

Info

Publication number
CA2135913A1
CA2135913A1 CA 2135913 CA2135913A CA2135913A1 CA 2135913 A1 CA2135913 A1 CA 2135913A1 CA 2135913 CA2135913 CA 2135913 CA 2135913 A CA2135913 A CA 2135913A CA 2135913 A1 CA2135913 A1 CA 2135913A1
Authority
CA
Canada
Prior art keywords
wireless communication
communication system
esc
decryption
handoffs
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
CA 2135913
Other languages
French (fr)
Other versions
CA2135913C (en
Inventor
Charles John Malek
Greg Gilbert Gravunder
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.)
Motorola Solutions Inc
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2135913A1 publication Critical patent/CA2135913A1/en
Application granted granted Critical
Publication of CA2135913C publication Critical patent/CA2135913C/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
    • H04L9/12—Transmitting and receiving encryption devices synchronised or initially set up in a particular manner
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/03—Protecting confidentiality, e.g. by encryption
    • H04W12/033—Protecting confidentiality, e.g. by encryption of the user plane, e.g. user's traffic
    • 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
    • H04L2209/80—Wireless
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements

Abstract

In a wireless communication system comprising a plurality of fixed communication units (FCUs) (102) and portable communication units (PCUs) (120), each comprising an encryption synchronization counter (ESC) (314, 414), the PCU (120) and FCU (102) having a digital transmission format (201), a method of maintaining encryption and decryption throughout a hand-off is shown, comprising the steps of: (a) loading (708) during a hand-off initiation a continuation value for a second FCU ESC; and (b) incrementing (709) synchronously the second FCU ESC and the PCU ESC, starting from the continuation value and beginning at the time of hand-off completion.
CA002135913A 1992-05-22 1993-05-11 Continuous synchronous encryption and decryption in a wireless communication system throughout handoffs Expired - Fee Related CA2135913C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US07/888,685 1992-05-22
US07/888,685 US5243653A (en) 1992-05-22 1992-05-22 Method and apparatus for maintaining continuous synchronous encryption and decryption in a wireless communication system throughout a hand-off
PCT/US1993/004420 WO1993025021A1 (en) 1992-05-22 1993-05-11 Continuous synchronous encryption and decryption in a wireless communications system throughout handoffs

Publications (2)

Publication Number Publication Date
CA2135913A1 true CA2135913A1 (en) 1993-12-09
CA2135913C CA2135913C (en) 1998-12-29

Family

ID=25393671

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002135913A Expired - Fee Related CA2135913C (en) 1992-05-22 1993-05-11 Continuous synchronous encryption and decryption in a wireless communication system throughout handoffs

Country Status (14)

Country Link
US (1) US5243653A (en)
EP (1) EP0641505B1 (en)
CN (1) CN1030879C (en)
AT (1) ATE195043T1 (en)
CA (1) CA2135913C (en)
DE (1) DE69329111T2 (en)
DK (1) DK0641505T3 (en)
ES (1) ES2149816T3 (en)
GR (1) GR3034578T3 (en)
MX (1) MX9302947A (en)
MY (1) MY109185A (en)
PT (1) PT641505E (en)
TW (1) TW223207B (en)
WO (1) WO1993025021A1 (en)

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US7890947B2 (en) * 2000-10-13 2011-02-15 Sony Corporation System, method and apparatus for embedded firmware code update
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Also Published As

Publication number Publication date
EP0641505B1 (en) 2000-07-26
PT641505E (en) 2000-11-30
GR3034578T3 (en) 2001-01-31
CN1082274A (en) 1994-02-16
DK0641505T3 (en) 2000-11-27
CN1030879C (en) 1996-01-31
TW223207B (en) 1994-05-01
CA2135913C (en) 1998-12-29
EP0641505A4 (en) 1997-08-20
DE69329111D1 (en) 2000-08-31
WO1993025021A1 (en) 1993-12-09
ATE195043T1 (en) 2000-08-15
DE69329111T2 (en) 2001-03-22
MX9302947A (en) 1994-05-31
MY109185A (en) 1996-12-31
EP0641505A1 (en) 1995-03-08
US5243653A (en) 1993-09-07
ES2149816T3 (en) 2000-11-16

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Legal Events

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EEER Examination request
MKLA Lapsed
MKLA Lapsed

Effective date: 20020513