The FREE Cybersecurity Glossary by Thor Pedersen!

Trusted system: A system that has been thoroughly reviewed, tested, and proven to reliably enforce security policies. The trust in these systems comes from their proven ability to protect the confidentiality, integrity, and availability of the data they handle, even in the presence of threats.

Trust model: This outlines the approach to trust relationships within a network or between systems. It defines how trust is established, who or what can be trusted, and the extent to which trust is granted. Models can vary from simple (one trusted entity) to complex (hierarchical or web-of-trust models).

Trust services criteria: A set of professional attestation and advisory services based on a core set of principles and criteria that address the risks and opportunities of IT-enabled systems and privacy programs. They are used in the evaluation of the design and operational effectiveness of an entity's controls relevant to security, availability, processing integrity, confidentiality, and privacy.

Tunnel: A secure communication channel that uses encryption and encapsulation to transmit data privately across public networks. Often used in the context of VPNs to ensure secure, remote access to a network, keeping the data confidential and intact from end to end.

Tunneling: Tunneling is a protocol that allows for the secure movement of data from one network to another. It involves encapsulating a network protocol within packets carried by the second network. Tunneling is often used in virtual private networks (VPNs) to secure data over untrusted networks like the internet.

Tunnel mode: A mode of operation in IPsec where both the header and the payload of the IP packet are protected during transmission. This mode is commonly used in VPNs (Virtual Private Networks) as it allows a network device to act as an intermediary, encapsulating and encrypting all traffic passing through it.