Keyless access control device
First Claim
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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Accused Products
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.
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Citations
9 Claims
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1. A keyless authorized access control system, the system comprising:
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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. - View Dependent Claims (2)
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3. A keyless authorized access control system, the system comprising:
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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. - View Dependent Claims (4)
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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. - View Dependent Claims (6, 7)
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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. - View Dependent Claims (9)
Specification