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Integrated circuit and error detection method therefor

An integrated circuit, error detection technology, applied in the protection of internal/peripheral computer components, etc., can solve problems such as circuit error attack sensitivity

Active Publication Date: 2016-06-22
WINBOND ELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention proposes an integrated circuit and its error detection method, which solves the problem of low sensitivity in detecting various clock tree circuit error attacks in the prior art

Method used

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  • Integrated circuit and error detection method therefor
  • Integrated circuit and error detection method therefor

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Embodiment Construction

[0022] The embodiment of the present invention provides a system and method for detecting the occurrence of a clock tree circuit error in an integrated circuit. In an embodiment of the present invention, an integrated circuit includes a clock tree circuit, and a clock signal source in the clock tree circuit issues a clock signal to each hardware unit in the integrated circuit. The clock tree circuit usually includes circuit wires that extend to most integrated circuits and active components, such as amplifiers, buffers, latches, and / or inverters.

[0023] In some cases, the clock tree circuit may be erroneously attacked in an attempt to analyze the function of the integrated circuit or attempt to obtain access to the information in the integrated circuit. Error attacks usually impose some constant or temporary abnormalities to the clock tree circuit and attempt to force the integrated circuit into an abnormal state that evades its protection mechanism. Although the following con...

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Abstract

The invention provides an integrated circuit and an error detection method therefor. The integrated circuit comprises a clock tree circuit and a protective circuit. The clock tree circuit is used for releasing a clock signal to the whole integrated circuit. The protective circuit runs according to one or more reference clocks of clock signals sampled at a plurality of sampling points of the clock tree circuit and is used for detecting whether the clock tree circuit has an error or not, wherein the error reflects exceptions of the one or more reference clocks. According to the integrated circuit and the error detection method, error attacks of various clock tree circuits can be effectively detected.

Description

Technical field [0001] The present invention relates to a digital electronic circuit, especially a system and method for protecting a clock tree circuit from errors, specifically an integrated circuit and an error detection method thereof. Background technique [0002] There are many techniques that can be used to obtain, analyze, or extract information from secure electronic circuit systems, such as encrypted circuits. Some attacks called fault injection usually cause circuit faults (fault), for example, by physically contacting or destroying signal lines, by applying high-power lasers or electromagnetic pulses, or by generating glitches on the power supply or other external interfaces. ). The above errors may cause the circuit to output sensitive information or assist an attacker to penetrate the circuit or its stored information. Therefore, the present invention proposes an integrated circuit and an error detection method thereof. Summary of the invention [0003] The presen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/72
Inventor 尼尔·塔莎
Owner WINBOND ELECTRONICS CORP