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Related Concept Videos

Masking and Demasking Agents01:19

Masking and Demasking Agents

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EDTA titrations may necessitate masking and demasking agents to temporarily protect a particular metal ion in a mixture from the EDTA reaction. These agents facilitate the sequential analysis of the metal ions by forming stable complexes with some—but not all—metal ions during certain steps.
There are many masking agents, such as cyanide, fluoride, triethanolamine, thiourea, and 2,3-bis(sulfanyl)propan-1-ol (formerly 2,3-dimercapto-1-propanol), with the masking agent chosen based on...
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Quasi-light Storage for Optical Data Packets
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Security mesh-based optical network exploiting the double masking scheme.

Manying Feng, Yiyuan Xie, Li Dai

    Optics Express
    |December 16, 2022
    PubMed
    Summary
    This summary is machine-generated.

    A new optical security network uses a double masking (DM) scheme with chaotic signals for secure multipoint communication. This method offers robust encryption and key distribution in optical networks, ensuring data privacy.

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    Area of Science:

    • Optical Network Security
    • Chaos Theory Applications
    • Secure Communication Systems

    Background:

    • Optical networks face significant security and privacy challenges.
    • Existing solutions may not adequately address multipoint confidential communication needs.
    • Chaotic signal properties offer potential for advanced encryption techniques.

    Purpose of the Study:

    • To propose and theoretically investigate a novel mesh-based optical security network.
    • To implement a double masking (DM) scheme for multipoint confidential communication.
    • To analyze the security and performance of the proposed network.

    Main Methods:

    • Utilizing mutually asynchronous vertical-cavity surface-emitting lasers (VCSELs) as transceivers.
    • Employing delay fiber (DF) for unique network node markers.
    • Implementing message encryption via the DM scheme at the transmitter.
    • Analyzing transceiver synchronization using cross-correlation coefficient under parameter mismatches.
    • Simulating communication performance over 100 km transmission for 10 Gb/s messages.

    Main Results:

    • Chaos synchronization between transceivers demonstrates excellent robustness to mismatched parameters.
    • The DM scheme exhibits high tolerance to inherent parameter mismatch.
    • High-quality synchronization (correlation coefficient of 0.983) was achieved.
    • Two 10 Gb/s messages were effectively concealed and decoded after 100 km transmission.
    • The system demonstrated reliable security against illegal attacks.

    Conclusions:

    • The proposed mesh-based optical security network with the DM scheme is suitable for constructing secure optical networks.
    • The chaotic encryption scheme provides a novel method for legitimate nodes to establish security keys.
    • The system offers effective and secure multipoint communication over optical networks.