Classifications

• • 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

Definitions

• This invention relates to a method according to the preamble of claim 1.
• Identification systems of this type are well known, for instance from US-patent 2 293 399.
• the objects to be identified by such systems may be of any kind, but they often are animals, for instance as described in US-patent 5 211 129. No specific means are disclosed in the patent specifications mentioned above for preventing or at least detecting fraud by copying transponders wherein the identification code of some valuable object such as an animal is stored.
• the transponders usually make use of integrated circuits (chips) as active elements.
• chips integrated circuits
• Fraud by copying the code of a specific transponder into an OTP transponder in order to obtain two identical transponders can occur and needs to be made impossible.
• One well known approach is to use a secret key and some cryptographic algorithm (symmetric or asymmetric) to generate a cyphrate out of a random number sent to the transponder as challenge. The cryphrate is sent back from the transponders to the reader.. Often the code of the transponder is also used as input to the cryptographic algorithm. Knowing algorithm and secret key (or public key in asymmetric systems) the reader can authenticate the transponder at any time. This method, however needs to make use of at least one secret key and therefore requires sophisticated key handling.
• This invention aims in providing security against copying without reaching the level of cryptography.
• This security is obtained by the characterising features of claim 1.
• the advantage of this method is that it is not requiring complicated and error prone key handling and requires almost no computing power. The latter in contrast to cryptographic methods.
• the method makes use of a chip serial number that makes the combination of the code and the chip serial number almost unique as long as the respective chip manufacturer never produces two identical serial numbers.
• a database can be used either at identification set-up time when the code/serial number pair is stored into the database or at code read time. At both moments the databasecan be searched for double serial numbers and/or codes.
• a checksum (e.g. CRC) can be generated from the serial number and used for the above mechanism instead of the serial number. This however may reduce security.
• a chip manufacturer identification may also be associated to the chip and made part of the serial number using the above method.
• This identification of the manufacturer or the user of the chip may be a trademark such as the registered trademark RID of applicant.
• a geographic information etc. can be stored into the database to facilitate plausibility checks.
• Other and additional information may be stored in the memory of the transponder. A possible method is described below, whereby additional information mentioned therein may be omitted or replaced by other specific information.
• the code, the die serial number, and the die manufacturer-ID are combined into a consistency check number using a standardised method, e.g. a CRC scheme.
• the resulting number is programmed into the trailer bits and needs to be stored in the respective database, marked down in the animals passport, etc. for subsequent consistency check.
• the code, the die serial number, the die manufacturer-ID, and the trailer bits are read and the same method is applied to check consistency of all four numbers.
• the tag transponder
• This method can prevent from copying transponders as long as no OTP dies are available that allow the programming of die serial number and die manufacturer-ID at code programming time.

Priority Applications (7)

Applications Claiming Priority (1)

Publications (1)

Family

ID=8236283

Family Applications (2)

Family Applications After (1)

Country Status (6)

Cited By (1)

Families Citing this family (8)

Citations (8)

• 1998
  • 1998-08-26 EP EP98810845A patent/EP0982687A1/fr not_active Withdrawn
• 1999
  • 1999-08-25 DK DK99810764T patent/DK0982688T3/da active
  • 1999-08-25 DE DE69901589T patent/DE69901589T2/de not_active Expired - Lifetime
  • 1999-08-25 EP EP99810764A patent/EP0982688B1/fr not_active Expired - Lifetime
  • 1999-08-25 ES ES99810764T patent/ES2175917T3/es not_active Expired - Lifetime
  • 1999-08-25 AT AT99810764T patent/ATE218231T1/de not_active IP Right Cessation
• 2000
  • 2000-08-29 HK HK00105382A patent/HK1026287A1/xx not_active IP Right Cessation

Patent Citations (8)

Also Published As

Similar Documents

Legal Events