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Data safety device and temperature sensing circuit thereof

A temperature sensing circuit and data security technology, applied in the field of data security, can solve the problems of high power consumption, complex implementation, large circuit area, etc., and achieve the effect of low power consumption and simple manufacture

Inactive Publication Date: 2014-05-07
SHENZHEN ZHENGTONG ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The custom analog circuit used by ordinary temperature detection circuit modules usually uses the temperature characteristics of diodes to detect temperature changes, and then converts the temperature into digital quantities for measurement through analog-to-digital conversion devices such as AD. This method is complex to implement, and the circuit area is large and high power consumption

Method used

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  • Data safety device and temperature sensing circuit thereof
  • Data safety device and temperature sensing circuit thereof

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Embodiment Construction

[0017] In order to describe the structure and features of the present invention in detail, the following preferred embodiments are given and described below with accompanying drawings.

[0018] see figure 1 and 2 , The embodiment of the data security device of the present invention includes: a ring oscillator 1 , a counter 2 connected to the ring oscillator 1 and a self-destruct controller 3 connected to the counter 2 . From a logical point of view, the self-destruction controller 3 controls a memory (not shown) with a self-destruction function for storing key data, and the self-destruction controller 3 can initiate self-destruction to the key located in the memory. Data is erased; from a physical point of view, the memory can be built into the self-destruct controller 3, or it can be set independently relative to the self-destruct controller 3.

[0019] The ring oscillator 1 is a loop including an odd number of inverters 11 connected in series. The present invention utiliz...

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Abstract

The invention provides a data safety device and a temperature sensing circuit of the data safety device. The temperature sensing circuit is based on a digital standard unit and comprises a ring oscillator and a counter connected with the ring oscillator. The ring oscillator outputs oscillation frequency relevant to temperature, the counter counts the oscillation frequency, and the counting result is a counting value relevant to temperature. According to the data safety device and the temperature sensing circuit, the temperature can be monitored through a simple digital circuit, and therefore data safety under the low temperature condition is guaranteed.

Description

technical field [0001] The present invention relates to the physical protection of electronic secret information such as important data and keys, and particularly relates to the security of data that is easily attacked in a low-temperature environment. Background technique [0002] In the era of rapid development of computers, many electronic devices are becoming more and more widely used in people's lives. Electronic data storage is the basic application of these electronic devices such as computers, and it also provides great convenience for consumers of all levels. People have become more and more dependent on the convenient and efficient lifestyles provided by various electronic devices, and various large and small enterprises also rely on electronic devices to meet the various needs of their consumers. With the increasing requirements and the general public's emphasis on the protection of personal privacy, the security of such electronic data has become an increasingly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/78G06F11/30
CPCG06F21/88
Inventor 冯婷秦云川李肯立首南青余思阳
Owner SHENZHEN ZHENGTONG ELECTRONICS