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Keyless access control device

  • US 20040006691A1
  • Filed: 06/23/2003
  • Published: 01/08/2004
  • Est. Priority Date: 02/15/2001
  • Status: Abandoned Application
First Claim
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1. A keyless authorized access control system, the system comprising:

  • at least two object modules, each object module being assigned to a respective object; and

    at least one identification device, each identification device having a microprocessor and a memory element;

    wherein each identification device and the object modules have respective bidirectional data communications links between them for communicating encoded data, the data communicated between an identification device and an object module being encoded using an encryption algorithm that performs a symmetric encryption method which uses an encryption parameter respectively assigned to the object module;

    wherein the memory element of each identification device stores at least two different encryption algorithms, wherein the microprocessor of an identification device selects one of the stored encryption algorithms to be used for encoding the data to be communicated between the identification device and an object module.

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