diff --git a/demos/security/marvell/README.md b/demos/security/marvell/README.md
index 5502a072..7c81d388 100644
--- a/demos/security/marvell/README.md
+++ b/demos/security/marvell/README.md
@@ -29,3 +29,28 @@ configuration.
 ## Video Recording
 
 see <https://marvell.zoom.us/rec/share/aiA94wryZcAul5HnOpe8xzCH_LVUOItBraNrjUMsopFsnMiWtDdRIClTSHuwLSb6.BL6WoMiOBX2Vb97L>
+
+---------------------------------------------------------------------
+
+# Strongswan integration into Marvell DPU using opi-strongswan-bridge
+
+This demo shows strongswan configuration on Marvell DPU using
+opi-strongswan-bridge. opi-strongswan-bridge is a secure server and allows
+IPSec off-chip configuration using gRPC based OPI security APIs. It will write
+this configuration to Strongswan via vici socket interface. Strongswan in Linux
+control plane handles IKE negotiation. IKE packets received in data path by VPP
+are transferred to Linux control plane using lcp plugin in VPP. After IKE
+negotiation, VPP imports the ip xfrm config from Linux and encrypts traffic.
+
+### remote client
+
+- Run ipsec-config.py from opi-poc on external server
+
+### dpu applications
+
+- Run opi-strongswan-bridge
+- Run VPP
+- Run Strongswan
+
+## Demo Link
+see <https://marvell.zoom.us/rec/share/J9G--oOZyB7WdZo3Xbp5gXO8pegHYOid0uB3Ujm9l19R4FRzZs97kq530yr48lOV.3dhm7jLYQopko5sI>