An advanced persistent threat is a network attack in which an unauthorized person gains access to a network and stays there undetected for a long period of time. The purpose of an APT attack is to steal data rather than to cause damage.
The CVSS (Common Vulnerability Scoring System) rates the severity of software vulnerabilities so organizations are able to prioritize mitigation.
A differential power analysis (DPA) attack is an exploit based on analysing the correlation between the electricity usage of a chip in a smart card and the encryption key it contains.
A vulnerability scan detects and classifies system weaknesses in computers, networks and communications equipment and predicts the effectiveness of countermeasures.