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GB2260208B - Authentication system - Google Patents

Authentication system

Info

Publication number
GB2260208B
GB2260208B GB9225736A GB9225736A GB2260208B GB 2260208 B GB2260208 B GB 2260208B GB 9225736 A GB9225736 A GB 9225736A GB 9225736 A GB9225736 A GB 9225736A GB 2260208 B GB2260208 B GB 2260208B
Authority
GB
United Kingdom
Prior art keywords
authentication system
authentication
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.)
Expired - Fee Related
Application number
GB9225736A
Other versions
GB9225736D0 (en
GB2260208A (en
Inventor
Andrew Hopper
Roger Michael Needham
David John Wheeler
Roy Want
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.)
AT&T Laboratories Cambridge Ltd
Original Assignee
Olivetti Research Ltd
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
Priority claimed from GB8903736A external-priority patent/GB2230365B/en
Priority to US07/973,264 priority Critical patent/US5402469A/en
Application filed by Olivetti Research Ltd filed Critical Olivetti Research Ltd
Priority to GB9225736A priority patent/GB2260208B/en
Publication of GB9225736D0 publication Critical patent/GB9225736D0/en
Publication of GB2260208A publication Critical patent/GB2260208A/en
Application granted granted Critical
Publication of GB2260208B publication Critical patent/GB2260208B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/75—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/20—Individual registration on entry or exit involving the use of a pass
    • G07C9/28—Individual registration on entry or exit involving the use of a pass the pass enabling tracking or indicating presence

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Electromagnetism (AREA)
  • Lock And Its Accessories (AREA)
  • Mobile Radio Communication Systems (AREA)
GB9225736A 1989-02-18 1992-12-09 Authentication system Expired - Fee Related GB2260208B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US07/973,264 US5402469A (en) 1989-02-18 1992-11-09 Carrier locating system
GB9225736A GB2260208B (en) 1989-02-18 1992-12-09 Authentication system

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB8903736A GB2230365B (en) 1989-02-18 1989-02-18 Mobile carrier tracking system
US07/973,264 US5402469A (en) 1989-02-18 1992-11-09 Carrier locating system
GB9225736A GB2260208B (en) 1989-02-18 1992-12-09 Authentication system

Publications (3)

Publication Number Publication Date
GB9225736D0 GB9225736D0 (en) 1993-02-03
GB2260208A GB2260208A (en) 1993-04-07
GB2260208B true GB2260208B (en) 1993-09-01

Family

ID=27264330

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9225736A Expired - Fee Related GB2260208B (en) 1989-02-18 1992-12-09 Authentication system

Country Status (1)

Country Link
GB (1) GB2260208B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2303579B (en) * 1995-07-24 1999-07-14 Ronald James Care Visitor identification

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0028965A1 (en) * 1979-11-09 1981-05-20 Bull S.A. System for the identification of persons requesting access to certain areas
GB2100897A (en) * 1981-06-22 1983-01-06 William Shiu Hung Cheung Personnel identification device
GB2102996A (en) * 1981-07-01 1983-02-09 Securitas Int Ab Security system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0028965A1 (en) * 1979-11-09 1981-05-20 Bull S.A. System for the identification of persons requesting access to certain areas
GB2100897A (en) * 1981-06-22 1983-01-06 William Shiu Hung Cheung Personnel identification device
GB2102996A (en) * 1981-07-01 1983-02-09 Securitas Int Ab Security system

Also Published As

Publication number Publication date
GB9225736D0 (en) 1993-02-03
GB2260208A (en) 1993-04-07

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20020218