• 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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  • session replay

    Session replay is a scheme a cracker uses to masquerade as an authorized user on an interactive Web site... (Continued) 

  • promiscuous mode

    In a network, promiscuous mode allows a network device to intercept and read each network packet that arrives in its entirety. This mode of operation is sometimes given to a network snoop server that captures and saves all packets for analysis (for ... 

  • RADIUS (Remote Authentication Dial-In User Service)

    Remote Authentication Dial-In User Service (RADIUS) is a client/server protocol and software that enables remote access servers to communicate with a central server to authenticate dial-in users and authorize their access to the requested system or s... 

  • salt

    In password protection, salt is a random string of data used to modify a password hash. 

  • shadow password file

    In the Linux operating system, a shadow password file is a system file in which encryption user password are stored so that they aren't available to people who try to break into the system. 

  • public key certificate

    A public key certificate is a digitally signed document that serves to validate the sender's authorization and name. 

  • private key (secret key)

    In cryptography, a private or secret key is an encryption/decryption key known only to the party or parties that exchange secret messages. 

  • NCSA

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

  • passphrase

    A passphrase is a string of characters longer than the usual password (which is typically from four to 16 characters long) that is used in creating a digital signature (an encoded signature that proves to someone that it was really you who sent a mes... 

  • password

    A password is an unspaced sequence of characters used to determine that a computer user requesting access to a computer system is really that particular user.