METHOD AND DEVICE FOR PROVIDING A CRYPTOGRAPHIC KEY FOR A FIELD DEVICE
1 Assignment
0 Petitions
Accused Products
Abstract
A security device and a method provide a cryptographic key for a field device. The security device is connected to at least one tamper sensor which is associated with the field device and which, when a physical manipulation carried out on the field device is detected, a manipulation message is emitted. The cryptographic key is only provided to the field device by the security device if the security device does not receive a manipulation message from the tamper sensors associated with the field device.
23 Citations
31 Claims
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1-15. -15. (canceled)
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16. A security device assembly for providing a cryptographic key for a field device, comprising:
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a security device configured for receiving from at least one tamper sensor assigned to the field device a manipulation message emitted by the at least one tamper sensor upon detecting a physical manipulation carried out on the field device; said security device being configured to make the cryptographic key available to the field device only if the security device does not receive a manipulation message from the at least one tamper sensor assigned to the field device. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A method of providing a cryptographic key for a field device, the method which comprises:
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monitoring with one or more tamper sensors a potential physical manipulation carried out on the field device; providing a security device; and making the cryptographic key available to the field device by the security device only if, within a specified period of time, the security device does not receive from the one or more tamper sensors assigned to the field device a manipulation message reporting a physical manipulation carried out on the field device. - View Dependent Claims (29, 30, 31)
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Specification