A Secret Weapon For Anti-Tamper Digital Clocks
A Secret Weapon For Anti-Tamper Digital Clocks
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Clock-signals with uneven duty cycles may be detected by utilizing dual circuits: a person pushed by the clock sign and another driven with the negated clock signal. With no dual circuits, the frequency might be slowed down undetectably by expanding the reset interval but maintaining the evaluation time period continual.
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delaying the monotone signal making use of each from the plurality of resettable delay line segments to make a respective plurality of delayed monotone signals Each and every owning both a one or even a zero logic value; and
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What on earth is claimed is: 1. A way for detecting clock tampering, comprising: providing a plurality of resettable delay line segments, wherein resettable delay line segments amongst a resettable hold off line section linked to a minimal delay time and also a resettable delay line section affiliated with a most delay time are Each individual related to discretely growing hold off situations;
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Disclosed is a technique for detecting clock tampering. In the tactic a plurality of resettable hold off line segments are supplied. Resettable delay line segments amongst a resettable hold off line segment affiliated with a minimum delay time and a resettable delay line segment related to a highest delay time are each linked to discretely escalating delay instances.
An exemplary storage medium is coupled into the processor this kind of the processor can read through information and facts from, and write info to, the storage medium. In the alternative, the storage medium could be integral on the processor. The processor plus the storage medium may well reside in an ASIC. The ASIC could reside within a person terminal. In the alternative, the processor as well as storage medium might reside as discrete components in the computing process/consumer terminal.
12. The equipment for detecting clock tampering as described in assert eleven, whereby the water stage quantity is set based upon delayed monotone indicators from one or more previous clock evaluate time.
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A monotone sign is delivered throughout an Appraise time period. The monotone signal is delayed working with Every of the plurality of resettable hold off line segments to create a respective plurality of delayed monotone signals. A clock is used to cause an Examine circuit that makes use of the plurality of delayed monotone signals to detect a voltage fault.
an Examine circuit, induced by a clock, that employs the plurality of delayed monotone signals to detect a voltage fault.