IDENTIFICATION SYSTEM FOR INDIVIDUALS

• US 3,806,874 A
• Filed: 04/10/1973
• Issued: 04/23/1974
• Est. Priority Date: 04/11/1972
• Status: Expired due to Term

• Current Assignee: Multimil International SA
• Original Assignee: Kurt Ehrat
• Inventors: Ehrat, Kurt
• Primary Examiner(s): Yusko, Donald J.
• Application Number:
  US05/349,862
• Time in Patent Office: 378 Days
• Field of Search: 340/149R,164R,152T
• US Class Current: 713/185
• CPC Class Codes: G06K 19/04 characterised by the shape
• CPC Class Codes: G06K 19/048 the record carrier being shaped as a key
• CPC Class Codes: G06K 19/07 with integrated circuit chips
• CPC Class Codes: G06K 19/0728 the arrangement being an optical or sound-based communication interface
• CPC Class Codes: G06K 19/07743 External electrical contacts
• CPC Class Codes: G06K 19/07749 the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
• CPC Class Codes: G06K 19/07762 the adhering arrangement making the record carrier wearable, e.g. having the form of a ring, watch, glove or bracelet record carriers for insertion in the human body for medical purposes A61B90/00; record carriers adapted for attachment to animals A01K11/00
• CPC Class Codes: G06K 19/07769 the further communication means being a galvanic interface, e.g. hybrid or mixed smart cards having a contact and a non-contact interface
• CPC Class Codes: G06K 7/1097 Optical sensing of electronic memory record carriers, such as interrogation of RFIDs with an additional optical interface
• CPC Class Codes: G06Q 20/341 Active cards, i.e. cards including their own processing means, e.g. including an IC or chip
• CPC Class Codes: G06Q 20/40975 using encryption therefor
• CPC Class Codes: G07C 9/215 the system having a variable access-code, e.g. varied as a function of time
• CPC Class Codes: G07C 9/28 the pass enabling tracking or indicating presence
• CPC Class Codes: G07C 9/29 the pass containing active electronic elements, e.g. smartcards
• CPC Class Codes: G07F 7/082 Features insuring the integrity of the data on or in the card
• CPC Class Codes: G07F 7/1008 Active credit-cards provided with means to personalise their use, e.g. with PIN-introduction/comparison system
• CPC Class Codes: G07F 7/1025 Identification of user by a PIN code

Abstract

The identification unit described in this specification comprises a testing station for identifying each of a plurality of identification units adapted to be carried or worn by authorized personnel. Each unit has data stored therein which is different from the data stored in other units and includes a generator for generating first and second data pulse sequences in accordance with the stored data; the testing station also includes a store for storing data and a generator for generating in response to the contents of its associated store pulse sequences identical to the pulse sequences generated by each unit so that when a unit is coupled to the testing station a comparator in that unit compares the first pulse sequence generated thereby with the first pulse sequence generated by the testing station and if the sequences are found to be identical causes the unit to generate the second pulse sequence which is compared in a comparator in the testing station with the second pulse sequence generated thereby to produce an identification signal if the two second pulse sequences are identical. The circuits of each unit may be encapsulated and mounted in a wrist strap to be worn by an authorized individual and the unit may be inductively coupled or coupled by radio means to the testing station.

Claims

1. An identification system comprising:

a testing station, and a plurality of identification units, each unit comprising, a first store storing data unique to that unit, a first generator coupled to said first store for generating first and second data sequences coded by the data stored in said first store, and a first comparator, said testing station including, a second generator generating first and second data sequences corresponding to those sequences generated by said first generator, a second comparator, means for coupling a unit to said testing station to apply the first data sequences generated by said first and second generators to said first comparator;

said first comparator generating a signal upon correspondence between said first data sequences, means responsive to said signal to trigger the first generator to generate said second data sequence, and means for applying the second data sequences from said first and second generators to said second comparator to produce an output signal therefrom upon correspondence between the two second data sequences.

2. A system according to claim 1 in which each unit further includes a second store storing data identifying an individual to whom the unit is to be issued, said second store being coupled to said first generator which is adapted to generate said first and second data sequences coded by data in both said first and second stores and wherein said second generator is adapted to generate data sequences corresponding to the first and second data sequences coded by the data in both said first and second stores.

3. A system according to claim 2 wherein said testing station includes a third store having a plurality of pairs of stages corresponding in number to the number of identification units, one stage of each pair storing data of the first data sequence as coded by the data in both first and second stores and as generated by the second generator and the other stage of each pair storing data of the second data sequence generated by said second generator.

4. A system according to claim 2 in which said second generator includes a fourth store storing data of the first and second data sequences generated by said second generator and an encoding computer responsive to data corresponding to the identifying data stored in said second store and the data in said fourth store to generate said first and second data sequences.

5. A system according to claim 1 wherein said first store comprises first and second parts, said first part storing the data of said first data sequence and the second part storing the data of said second data sequence.

6. A system according to claim 1 wherein each first generator includes an encoding computer responsive to the data stored in said first store to generate said first and second data sequences.

7. A system according to claim 6 wherein each unit includes a fifth store storing data identifying an indiviudal to whom the unit is to be issued, said encoding computer being responsive to the data in said first and fourth stores to generate said first and second data sequences.

8. A system according to claim 2 wherein said testing station includes a generator generating random signals and applying them to said first and second generators to modify the first and second data sequences generated thereby.

9. A system according to claim 2 wherein said testing station and each said unit includes a clock supply time data modifying the first and second data sequences generated by said first and second generators.

10. A system according to claim 1 wherein each unit is constructed as a wrist band, said first store, first generator and first comparator being encapsulated integrated circuit elements incorporated in said band.

11. A system according to claim 10 wherein said band includes a releasable coupling enabling said band to be held on a wearer'"'"''"'"'s wrist, said coupling including means for destroying the data in said first store when the coupling is released to remove the band from the wearer'"'"''"'"'s wrist.

12. A system according to claim 10 wherein each said unit and said testing station includes radio transmission and reception means to enable each unit to be electromagnetically coupled to said testing station.

13. A system according to claim 10 wherein said band includes a clock providing timing pulses for controlling the generation by said first generator of said first and second data sequences.