Keyless access control device

• US 20040006691A1
• Filed: 06/23/2003
• Published: 01/08/2004
• Est. Priority Date: 02/15/2001
• Status: Abandoned Application

• Current Assignee: Leopold Kostal GmbH & Company KG
• Original Assignee: Leopold Kostal GmbH & Company KG
• Inventors: Preetzmann, Armin von, Bergmann, Eduard
• Application Number:
  US10/601,443
• Publication Number:
  US 20040006691A1
• Time in Patent Office: Days
• US Class Current: 713/150
• CPC Class Codes: B60R 25/24 using electronic identifiers containing a code not memorised by the user
• CPC Class Codes: G07C 2009/00261 the keyless data carrier having more than one function
• CPC Class Codes: G07C 9/00309 operated with bidirectional data transmission between data carrier and locks
• CPC Class Codes: G07C 9/00857 where the code of the data carrier can be programmed

Abstract

A keyless authorized access control system includes object modules and an identification device. The identification device has a microprocessor and memory. The identification device and the object modules have respective communications links between them for communicating encoded data. The data is encoded using an encryption algorithm that is used to perform a symmetric encryption method which uses an encryption parameter respectively assigned to the object module. The memory of each identification device stores different encryption algorithms. 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. Instead of the identification device, one of the object modules may have the memory and selects one of the stored encryption algorithms to be used by the identification device for encoding the data communicated by the identification device and an object module.

Claims

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.

2. The system of claim 1 wherein:

the encryption algorithm to be used for encoding the data to be communicated between the identification device and an object module is assigned by the identification device to the object module during a single initialization process between the identification device and the object module.

3. A keyless authorized access control system, the system comprising:

at least two object modules, each object module being assigned to a respective object, one of the object modules having a memory element; and

at least one identification device, 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 performs a symmetric encryption method which uses an encryption parameter respectively assigned to the object module;

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

4. The system of claim 3 wherein:

the encryption algorithm to be used by the identification device for encoding the data communicated by the identification device and an object module is assigned by the one object module to the identification device during a single initialization process between the identification device and the one object module.

5. An identification device for a keyless authorized access control system having at least two object modules, each object module being assigned to a respective object, wherein the identification device and the object modules have respective bidirectional data communications links between them for communicating encoded data, the data communicated between the identification device and an object module being encoded using an encryption algorithm that is used to perform a symmetric encryption method which uses an encryption parameter respectively assigned to the object module, the identification device comprising:

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

6. The identification device of claim 5 wherein:

the encryption algorithms stored in the memory element are configurable and replaceable through a programming interface.

7. The identification device of claim 5 wherein:

the memory element is integrated in the microprocessor.

8. An object module for a keyless authorized access control system having an identification device and at least one other object module, each object module being assigned to a respective object, wherein the identification device and the object modules have respective bidirectional data communications links between them for communicating encoded data, the data communicated between the identification device and an object module being encoded using an encryption algorithm that is used to perform a symmetric encryption method which uses an encryption parameter respectively assigned to the object module, the object module comprising:

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

9. The object module of claim 8 wherein:

the encryption algorithms stored in the memory element are configurable and replaceable through a programming interface.