Security

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NIST SP 800-27rA

Security is a system property. Security is much more than a set of functions and mechanisms. IT security is a system characteristic as well as a set of mechanisms that span the system both logically and physically.

NIST SP 800-30

Information system security is a system characteristic and a set of mechanisms that span the system both logically and physically.

NIST SP 800-33

Security is a system property. Security is much more that a set of functions and mechanisms. Information technology security is a system characteristic as well as a set of mechanisms which span the system both logically and physically.

NIST SP 800-66

Protecting information and information systems from unauthorized access, use, disclosure, disruption, modification, or destruction in order to provide-

(A) integrity, which means guarding against improper information modification or destruction, and includes ensuring information nonrepudiation and authenticity;
(B) confidentiality, which means preserving authorized restrictions on access and disclosure, including means for protecting personal privacy and proprietary information; and
(C) availability, which means ensuring timely and reliable access to and use of information. See Information Security. (44 U.S.C., Sec. 3542)