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IT security

Definitions:

  technological discipline concerned with ensuring that IT systems perform asexpected and do nothing more; that information is provided adequate protection for confidentiality; that system, data and software integrity is maintained; and that information and system resources are protected against unplanned disruptions of processing that could seriously impact mission accomplishment. Synonymous with Automated Information System Security, Computer Security and Information Systems Security.
Sources:
NIST SP 800-16 under IT Security