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Related Concept Videos

Electronic Distance Measuring Instruments01:30

Electronic Distance Measuring Instruments

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Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over...
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Errors in Global Positioning System01:26

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Global Positioning System (GPS) technology has revolutionized navigation and positioning, but its accuracy is often compromised by various errors. These errors, stemming from environmental, satellite, and receiver-related factors, require careful mitigation to ensure reliable performance across applications.Atmospheric ErrorsGPS signals travel through the Earth’s ionosphere and troposphere, introducing delays which affect accuracy. The ionosphere is strongly influenced by charged particles,...
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To achieve precise distance measurements, especially in surveying and construction, certain corrections must be applied to account for potential sources of error like the standardization errors, temperature variations, and slope adjustments.Standardization error emerges when measurement equipment undergoes changes, such as wear, repairs, or weather impacts. To address this, surveyors compare the equipment’s readings to a standard. This process identifies any deviation that might lead to...
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Updated: Sep 9, 2025

Preparing an Isotopically Pure 229Th Ion Beam for Studies of 229mTh
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An Improved SM2 Digital Signature Algorithm with High-Precision Timestamps for Trusted Metrological Data.

Zhanshuo Cao1, Boyong Gao1, Xingchuang Xiong2,3,4

  • 1School of Information Engineering, China Jiliang University, Hangzhou 310018, China.

Sensors (Basel, Switzerland)
|August 28, 2025
PubMed
Summary
This summary is machine-generated.

This study enhances the SM2 digital signature algorithm with high-precision time information to secure digitized metering data against tampering. The improved algorithm boosts efficiency and protects against replay attacks, ensuring data integrity.

Keywords:
data traceabilitydigital signatureelliptic curve cryptographyhigh-precision timestampmetrological data

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Area of Science:

  • Computer Science
  • Information Security
  • Data Integrity

Background:

  • Digitization of metering data enhances efficiency but faces risks from data tampering.
  • Ensuring the trustworthiness and integrity of digital metering data is a significant challenge.

Purpose of the Study:

  • To propose an improved SM2 digital signature algorithm for metering data.
  • To enhance the reliability and security of metering data through high-precision time information.

Main Methods:

  • Incorporating high-precision timestamps into SM2 signature generation and verification.
  • Optimizing the SM2 algorithm structure, including modular inversion, to reduce computational costs.

Main Results:

  • The improved algorithm significantly enhances signature generation efficiency.
  • High-precision time information bolsters temporal validity and overall security.
  • Effectively mitigates risks from random number dependency and replay attacks.

Conclusions:

  • The enhanced SM2 algorithm provides a secure and efficient solution for trustworthy metering data verification.
  • This approach strengthens the integrity of digitized metering data in the face of evolving cyber threats.