Apparatus and method for protecting diagnostic ports of secure devices
First Claim
Patent Images
1. An electronic system comprising:
- a processor;
a diagnostic port;
a switching circuit, including a switch connected between the diagnostic port and the processor, for enabling and disabling the diagnostic port and for restricting access to contents of the electronic system prior to enabling the diagnostic port.
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Abstract
An electronic system comprises a processor, a diagnostic port, and a switching circuit, including a switch connected between the diagnostic port and the processor, for enabling and disabling the diagnostic port and for restricting access to contents of the electronic system prior to enabling the diagnostic port. A method for operating the electronic system is also included.
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Citations
20 Claims
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1. An electronic system comprising:
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a processor;
a diagnostic port;
a switching circuit, including a switch connected between the diagnostic port and the processor, for enabling and disabling the diagnostic port and for restricting access to contents of the electronic system prior to enabling the diagnostic port. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of operating an electronic system, the method comprising:
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providing a switching circuit, including a switch connected between a diagnostic port and a processor for enabling and disabling the diagnostic port;
determining the operational status of the switch; and
using the switching circuit to restrict access to contents of the electronic system in response to the operational status of the switch prior to enabling the diagnostic port. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification