Interconnection Security Agreement

nounverified·updated May 9, 2026

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A document that regulates security-relevant aspects of an intended connection between an agency and an external system. It regulates the security interface between any two systems operating under two different distinct authorities. It includes a variety of descriptive, technical, procedural, and planning information. It is usually preceded by a formal MOA/MOU that defines high-level roles and responsibilities in management of a cross-domain connection.

polysemousMWENISTIR 7298: Glossary of Key Information Security Terms, Revision 2

Senses

2 more senses beyond the canonical

NISTIR 7298: Glossary of Key Information Security Terms, Revision 2

An agreement established between the organizations that own and operate connected IT systems to document the technical requirements of the interconnection. The ISA also supports a Memorandum of Understanding or Agreement (MOU/A) between the organizations.

NIST SP 800-171r3attested usage pack match

No definition is given in NIST SP 800-171r3. The term is attested in use at 2 citations in that document; a definition is pending curation.

Classifications

per-axis with provenance

Entity Type

Requirement92%llm-generatedllm:claude-haiku-4-5

?unassignedlast reviewed —

Sensitivity

Regulated88%llm-generatedllm:claude-haiku-4-5

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Information Class

Cui75%llm-generatedllm:claude-haiku-4-5

?unassignedlast reviewed —

Variants

4 surface forms

acronym: ISA
plural: Interconnection Security Agreements
possessive: Interconnection Security Agreement's
pluralpossessive: Interconnection Security Agreements'

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