intrusion detection parameter

This phrase is compositional rather than a term of art. "Intrusion detection" is a well-established field concept, and "parameter" is a generic technical word meaning a configurable value, threshold, or attribute; together they simply describe any measurable or configurable variable used within an intrusion detection context — such as a threshold, signature attribute, or detection rule value. In technical and patent usage, "intrusion parameters" refer to the set of criteria or values against which detected events are compared to determine whether an intrusion event has occurred, with those parameters defining which activity corresponds to which unusual or intrusion event. No authoritative standards body (NIST, ISO, AICPA, CIS) assigns this two-word phrase a specialized definition distinct from its component words.