IP Security definition in Computer Security terms:
Definition(s): Provide(s) interoperable, high quality, cryptographically-based security for IPv4 and IPv6. The set of security services offered includes access control, connectionless integrity, data origin authentication, detection and rejection of replays (a form of partial sequence integrity), confidentiality (via encryption), and limited traffic flow confidentiality.
Source(s): CNSSI 4009-2015 (IETF RFC 4301)
reference: CSRC Glossary