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  • N

    National Computer Security Center (NCSC)

    The National Computer Security Center (NCSC) is a U.S. government organization within the National Security Agency (NSA) that evaluates computing equipment for high security applications to ensure that facilities processing classified or other sensitive material are using trusted computer systems and components.

  • national identity card

    A national identity card is a portable document, typically a plasticized card with digitally-embedded information, that someone is required or encouraged to carry as a means of confirming their identity. Since the World Trade Center tragedy of September 11, 2001, many countries have discussed issuing national identity cards as a way to distinguish terrorists from the law-abiding population. (Continued)

  • National Security Agency (NSA)

    The National Security Agency (NSA) is the official U.S. cryptologic (the science of cryptographic design and decryption) organization.

  • NCSA

    NCSA at the University of Illinois in Urbana, Illinois is the home of the first Web browser that had a graphical user interface.

  • network behavior analysis (NBA)

    Network behavior analysis (NBA) is a method of enhancing the security of a proprietary network by monitoring traffic and noting unusual actions or departures from normal operation... (Continued)

  • network behavior anomaly detection (NBAD)

    Network behavior anomaly detection (NBAD) is the continuous monitoring of a proprietary network for unusual events or extraordinary trends.

  • network encryption (network layer or network level encryption)

    Network encryption (sometimes called network layer, or network level encryption) is a network security process that applies crypto services at the network transfer layer - above the data link level, but below the application level.

  • network forensics

    Network forensics is the capture, recording, and analysis of network events in order to discover the source of security attacks or other problem incidents.

  • network vulnerability scanning

    A vulnerability scan detects and classifies system weaknesses in computers, networks and communications equipment and predicts the effectiveness of countermeasures.

  • next-generation firewall (NGFW)

    A next-generation firewall (NGFW) is a hardware- or software-based network security system that is able to detect and block sophisticated attacks by enforcing security policies at the application level, as well as at the port and protocol level.

  • Nimda

    First appearing on September 18, 2001, Nimda is a computer virus that caused traffic slowdowns as it rippled across the Internet, spreading through four different methods, infecting computers containing Microsoft's Web server, Internet Information Server (IIS), and computer users who opened an e-mail attachment.

  • nonce (number used once or number once)

    A nonce, in information technology, is a number generated for a specific use, such as session authentication.

  • nonrepudiation

    Nonrepudiation is the assurance that someone cannot deny something, such as the receipt of a message or the authenticity of a statement or contract... (Continued)

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