Glossary

A method of mitigating the possibility of an active handset inadvertently allowing background discussions to be heard by a remote party. This can be achieved through the use of a hold feature, mute feature, push-to-talk handset or equivalent.

Activities in cyberspace that manipulate, deny, disrupt, degrade or destroy targeted computers, information systems, or networks.

Non-classified information identified as requiring basic protection (i.e. information marked as OFFICIAL or OFFICIAL: Sensitive).

An encryption method relying on a pre-shared key which is larger than or equal to the size of the plaintext to create ciphertext. While the One Time Pad is the only scheme to hold certain theoretical security properties, key management renders it impractical for modern use-cases.

Services directly accessible over the internet, including those located behind a perimeter firewall. Such services may also be referred to as internet-facing services.

Data that can be freely used, reused and redistributed by anyone.

A message format for encrypting, digitally signing, compressing and encoding data using OpenPGP cryptography.

Software that provides the interface through which users access a system. Operating systems also facilitate access to user applications, server applications, mobile applications and web applications.

Systems that detect or cause a direct change to the physical environment through the monitoring or control of devices, processes and events. Operational technology is predominantly used to describe industrial control systems which include supervisory control and data acquisition systems and distributed control systems.

Open System Interconnect