Definition(s)
Subject
An individual, process, or device causing information to flow among objects or a change to the system state.
Extended Definition: An active entity.
Adapted from: NIST SP 800-53 Rev 4., CNSSI 4009.
Source: NICCS™ Portal Cybersecurity Lexicon, National Initiative for Cybersecurity Careers and Studies (https://niccs.us-cert.gov/glossary) as of 11 November 2015, Global Standards