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  • O

    OCSP (Online Certificate Status Protocol)

    OCSP (Online Certificate Status Protocol) is one of two common schemes for maintaining the security of a server and other network resources.

  • onboarding and offboarding

    In identity management, onboarding is the addition of a new employee to an organization's identity and access management (IAM) system. The term is also used if an employee changes roles within the organization and is granted new or expanded access privileges. Conversely, offboarding refers to the IAM processes surrounding the removal of an identity for an employee who has changed roles or left the organization.

  • one-time pad

    In cryptography, a one-time pad is a system in which a private key generated randomly is used only once to encrypt a message that is then decrypted by the receiver using a matching one-time pad and key.

  • one-time password (OTP)

    A one-time password (OTP) is an automatically generated numeric or alphanumeric string of characters that will authenticate the user for a single transaction or session.

  • one-time password token (OTP token)

    A one-time password token (OTP token) is a security hardware device or software program that is capable of producing a single-use password or PIN passcode.

  • Open Source Hardening Project

    The Open Source Hardening Project is an initiative of the United States Department of Homeland Security, created to improve the security of open source code. Because the infrastructure of the Internet, financial institutions and many other critcal systems in the U.S. run on open source software, the security of these applications is crucial... (Continued)

  • Open System Authentication (OSA)

    Open System Authentication (OSA) is a process by which a computer can gain access to a wireless network that uses the Wired Equivalent Privacy (WEP) protocol. With OSA, a computer equipped with a wireless modem can access any WEP network and receive files that are not encrypted... (Continued)

  • OpenAppID

    OpenAppID is an application-layer network security plugin for the open source intrusion detection system Snort.

  • OpenVPN (open source virtual private network)

    OpenVPN is an open source virtual private network (VPN) product that offers simplified security, a modular network design and cross-platform portability. OpenVPN is licensed under the GNU General Public License (GPL). Private licenses are available for individuals or companies wishing to redistribute OpenVPN in modified form.

  • Operation Phish Phry

    Operation Phish Phry is a cybercrime investigation carried out by the United States Federal Bureau of Investigation (FBI), the Los Angeles Electronic Crimes Task Force and Egyptian authorities.

  • Oracle Critical Patch Update (Oracle CPU)

    The Oracle Critical Patch Update (CPU) is an ongoing series of regularly issued fixes for security flaws in products made by or maintained by software giant Oracle Corp.

  • out-of-band authentication

    Out-of-band authentication is a type of two-factor authentication that requires a secondary verification method through a separate communication channel along with the typical ID and password. Out-of-band authentication is often used in financial institutions and other organizations with high security requirements.

  • output feedback (OFB)

    In cryptography, output feedback (OFB) is a mode of operation for a block cipher.

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