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Related Concept Videos

Atomic Emission Spectroscopy: Interference01:30

Atomic Emission Spectroscopy: Interference

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In atomic emission spectroscopy (AES), high-temperature atomizers excite a broad range of elements and molecules that generate complex emissions from sources such as oxides, hydroxides, and flame combustion products in the flame or plasma. Several strategies can be employed to minimize spectral interferences caused by overlapping emission lines or bands. These include increasing instrument resolution, choosing alternative emission lines, optimally placing the detector in low-background regions,...
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Atomic Absorption Spectroscopy: Interference01:25

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Interference leads to systematic error in atomic absorption (AA) measurements by enhancing or diminishing the analytical signal or the background. These interferences can be grouped into three main categories: spectral interference, chemical interference, and physical interference.
Spectral interference occurs when signals from other elements or molecules overlap with the analyte signal, falsely elevating or masking the analyte's absorbance. This interference can be corrected using Zeeman,...
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Interference: Path Lengths01:10

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Consider two sources of sound, that may or may not be in phase, emitting waves at a single frequency, and consider the frequencies to be the same.
Two special sources may be considered when they are in phase. This can be easily achieved by feeding the two sources from the same source. An example would be synchronizing the two speakers by feeding them with the same source, such as the sound waves produced by a tuning fork. This setup ensures that the two sources have the same frequency and are...
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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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Security analysis on an interference-based optical image encryption scheme.

Y Xiong, J Gu, R Kumar

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    Summary
    This summary is machine-generated.

    This study reveals a security flaw in an improved optical cryptosystem. Hybrid attacks, utilizing known-plaintext attacks and iterative processes, can successfully recover the plaintext, demonstrating the silhouette problem

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    Area of Science:

    • Optics and Photonics
    • Information Security
    • Cryptography

    Background:

    • Improved optical cryptosystems encode plaintexts into phase-only masks (POMs) and amplitude masks (AMs).
    • Previous systems encoded plaintexts into two POMs, potentially vulnerable to the silhouette problem.

    Purpose of the Study:

    • To evaluate the security strength of an improved interference-based optical cryptosystem.
    • To investigate the vulnerability of the improved cryptosystem to known-plaintext attacks (KPA) and iterative processes.

    Main Methods:

    • A known-plaintext attack (KPA) was designed to recover the random phase mask (RPM).
    • Two iterative processes were developed to recover plaintext information using the recovered RPM and released masks.
    • Hybrid attacks combining KPA and iterative processes were proposed.

    Main Results:

    • The random phase mask (RPM) is independent of the plaintext, enabling its recovery via KPA.
    • The POM and AM provide additional constraints for iterative recovery processes.
    • The proposed hybrid attacks successfully demonstrated the existence of the silhouette problem in the improved cryptosystem.
    • Numerical simulations validated the effectiveness of the hybrid attacks.

    Conclusions:

    • The improved optical cryptosystem is vulnerable to the silhouette problem.
    • The proposed hybrid attacks provide a feasible method to break the security of this cryptosystem.
    • This research highlights the importance of considering plaintext-related keys in cryptosystem design.