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Related Concept Videos

Weak Base Solutions03:21

Weak Base Solutions

25.3K
Some compounds produce hydroxide ions when dissolved by chemically reacting with water molecules. In all cases, these compounds react only partially and so are classified as weak bases. These types of compounds are also abundant in nature and important commodities in various technologies. For example, global production of the weak base ammonia is typically well over 100 metric tons annually, being widely used as an agricultural fertilizer, a raw material for chemical synthesis of other...
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Strong Acid and Base Solutions03:22

Strong Acid and Base Solutions

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A strong acid is a compound that dissociates completely in an aqueous solution and produces a concentration of hydronium ions equal to the initial concentration of acid. For example, 0.20 M hydrobromic acid will dissociate completely in water and produces 0.20 M of hydronium ions and 0.20 M of bromide ions.
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Leveling Effect and Non-Aqueous Acid-Base Solutions02:11

Leveling Effect and Non-Aqueous Acid-Base Solutions

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This lesson defines the leveling effect in acidic and basic solutions and its role in aqueous and non-aqueous solutions. It is essential to understand the competing nature of various species in a chemical system.
The Leveling Effect of a Solvent
A generic acid (HA) reacts with the generic base (B-) to yield the corresponding conjugate base (A-) and conjugate acid (HB):
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Solution Composition During Acid/Base Titrations01:17

Solution Composition During Acid/Base Titrations

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The titration of a weak acid with a strong base results in the formation of water and the conjugate base of the acid. For instance, titrating acetic acid with sodium hydroxide leads to the formation of water and sodium acetate. A solution of acetic acid and sodium acetate constitutes a buffer whose relative concentration at different stages of the titration is indicated by the α values, which represent percentages of the weak acid and its conjugate base.
The α0 and α1 values...
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Increasing Function01:18

Increasing Function

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An increasing function exhibits a rise in output values as input values increase. This behavior is depicted graphically as a curve or line that slopes upward from left to right. Such a function satisfies the condition that if x1 < x2, then f(x1) < f(x2), indicating that the function values grow with increasing inputs. This concept is fundamental in understanding growth trends across various domains, such as population dynamics, financial investments, or resource consumption.The...
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Solution Formation02:16

Solution Formation

37.9K
There is no one solvent that can dissolve every type of solute. Some substances that readily dissolve in a certain solvent might be insoluble in a different solvent. A simple way to predict which substances dissolve in which solvent is the phrase "like dissolves like". This means that polar substances, such as salt and sugar, dissolve in a polar substance like water. In contrast, non-polar substances are more soluble in non-polar solvents such as carbon tetrachloride.
This selective...
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A Lightweight, Headphones-based System for Manipulating Auditory Feedback in Songbirds
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A PUF- and Biometric-Based Lightweight Hardware Solution to Increase Security at Sensor Nodes.

Rosario Arjona1, Miguel Ángel Prada-Delgado2, Javier Arcenegui3

  • 1Instituto de Microelectrónica de Sevilla (IMSE-CNM), Consejo Superior de Investigaciones Científicas (CSIC), Universidad de Sevilla, Américo Vespucio, 28, 41092 Seville, Spain. arjona@imse-cnm.csic.es.

Sensors (Basel, Switzerland)
|July 28, 2018
PubMed
Summary

This study introduces a novel, low-cost security solution for sensor nodes using Physically Unclonable Functions (PUFs) to protect secret keys and biometric data. The system enables dual-factor authentication, ensuring data integrity and privacy in resource-constrained environments.

Keywords:
Physically Unclonable Functions (PUFs)SRAM PUFsfingerprint recognitionlightweight biometricslow-power microcontrollersmultibiometricssecurity for sensor networkstrusted sensor nodes

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Area of Science:

  • Computer Science
  • Electrical Engineering
  • Information Security

Background:

  • Sensor nodes require robust security for sensitive data transmission despite processing, memory, and power constraints.
  • Symmetric key cryptography is suitable but necessitates secure secret key storage.
  • Physically Unclonable Functions (PUFs) offer a hardware-based solution to exploit unique device identities.

Purpose of the Study:

  • To present a low-cost method for obfuscating secret keys in sensor nodes using PUFs.
  • To propose a lightweight fingerprint recognition solution for sensor nodes, also secured by PUFs.
  • To enable dual-factor authentication for sensor data origin and user authorization.

Main Methods:

  • Leveraging SRAM within commercial Bluetooth Low Energy (BLE) chips for PUF implementation.
  • Developing a novel texture-based feature, QFingerMap16 (QFM), for lightweight fingerprint recognition.
  • Implementing a dual-factor authentication protocol combining node identity and user presence.

Main Results:

  • Demonstrated successful implementation of PUF-based key obfuscation using commercial BLE chip SRAMs.
  • Showcased the feasibility of implementing the QFM fingerprint recognition entirely within a low-cost sensor node.
  • Validated the dual-factor authentication protocol's effectiveness in securing sensor data.

Conclusions:

  • The proposed PUF-based approach provides a viable, low-cost security enhancement for sensor nodes.
  • The lightweight fingerprint recognition system enhances security and privacy for biometric data.
  • The dual-factor authentication protocol effectively authenticates both the sensor node and the authorized user.