• SYN flood (half open attack)

    SYN flooding is a method that the user of a hostile client program can use to conduct a denial-of-service (DoS) attack on a computer server.

  • digital certificate

    A digital certificate is an electronic "passport" that allows a person, computer or organization to exchange information securely over the Internet using the public key infrastructure (PKI). A digi...

  • COBIT

    COBIT  is a framework for developing, implementing, monitoring and improving information technology (IT) governance and management practices.

  • computer forensics (cyber forensics)

    Computer forensics is the application of investigation and analysis techniques to gather and preserve evidence from a particular computing device in a way that is suitable for presentation in a cou...

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  • security token (authentication token)

    A security token (sometimes called an authentication token) is a small hardware device that the owner carries to authorize access to a network service. 

  • pseudonymous profile

    A pseudonymous profile is a collection of information about a particular computer user that identifies the user either by their computer's IP address or by a randomly-generated nickname. 

  • trusted computing base (TCB)

    The trusted computing base (TCB) is everything in a computing system that provides a secure environment. 

  • Klez

    Klez (pronounced KLEHZ) is an Internet worm that launches automatically when a user previews or reads an e-mail message containing Klez on a system that has not been patched for a vulnerability in Microsoft Internet Explorer mail clients. 

  • VeriChip

    VeriChip is an injectable identification chip that can be inserted under the skin of a human being to provide biometric verification. 

  • deniable encryption

    Deniable encryption is a type of cryptography that allows an encrypted text to be decrypted in two or more ways, depending on which decryption key is used. 

  • 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 Se... 

  • CRAM (challenge-response authentication mechanism)

    CRAM (challenge-response authentication mechanism) is the two-level scheme for authenticating network users that is used as part of the Web's Hypertext Transfer Protocol (HTTP). 

  • 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. 

  • Palladium

    Palladium is a plan from Intel, AMD, and Microsoft to build security into personal computers and servers at the microprocessor level.