diff --git a/yaml/xyz/openbmc_project/Chassis/Intrusion.interface.yaml b/yaml/xyz/openbmc_project/Chassis/Intrusion.interface.yaml
index 5e350df..8ebae36 100644
--- a/yaml/xyz/openbmc_project/Chassis/Intrusion.interface.yaml
+++ b/yaml/xyz/openbmc_project/Chassis/Intrusion.interface.yaml
@@ -41,3 +41,13 @@
           - name: "TamperingDetected"
             description: >
                 Physical tampering is detected.
+
+associations:
+    - name: monitoring
+      description: >
+          One chassis intrusion sensor needs to implement the 'monitoring'
+          association to provide links to the inventory items that it is
+          monitoring the security state against intrusion events.
+      reverse_name: monitored_by
+      required_endpoint_interfaces:
+          - xyz.openbmc_project.Inventory.Item
diff --git a/yaml/xyz/openbmc_project/Inventory/Item.interface.yaml b/yaml/xyz/openbmc_project/Inventory/Item.interface.yaml
index 78cf994..209a6d0 100644
--- a/yaml/xyz/openbmc_project/Inventory/Item.interface.yaml
+++ b/yaml/xyz/openbmc_project/Inventory/Item.interface.yaml
@@ -78,3 +78,12 @@
       reverse_name: measuring
       required_endpoint_interfaces:
           - xyz.openbmc_project.Metrics
+    - name: monitored_by
+      description: >
+          Any inventory Item (usually Boards or Chassis) can optionally
+          implement the 'monitored_by' association to provide a link to the
+          chassis intrusion sensor that is monitoring its security state against
+          intrusion events.
+      reverse_name: monitoring
+      required_endpoint_interfaces:
+          - xyz.openbmc_project.Chassis.Intrusion