Deep web
Those portions of the Internet not indexed by standard search engines. Contrast darknet and dark internet
Denial-of-service attack
A cyber attack that renders a network or other computing resource unavailable to its users. Compare distributed denial-of-service attack.
Device Trust
The process of verifying that a device is known, secure, and uncompromised before allowing it to connect to a network or access resources.
Diamond model definition
A cyber threat intelligence analysis model that defines relationship pairs among four core components, visualized in the shape of a diamond, of adversary playbook activity across the intrusion kill chain:...
Dictionary attack
A way of searching for an encryption key or a password by working through a list of likely candidates. Less resource-intensive and usually faster than a brute force attack, but...
Differential fault analysis attack
A side-channel attack that induces unexpected environmental conditions—temperature, voltage, current, overclocking, electromagnetic fields, etc.—into a cryptographic implementation in order to reveal its internal state.
Digital certificate
An attachment to an electronic message used to verify the sender’s identity and to enable to recipient to return an encrypted response. Commonly called simply a “certificate.”