Department of Computer Engineering Department of Computer Science and Engineering Department of Electronic, Electrical and Computer Engineering Department of Electronic, Electrical and Computer Engineering Electronics and Telecommunications Research Institute This document defines a YANG data model for the Registration Interface between Security Controller and Developer's Management System (DMS) in the Interface to Network Security Functions (I2NSF) framework to register Network Security Functions (NSF) of the DMS with the Security Controller. The objective of this data model is to support NSF capability registration and query via I2NSF Registration Interface.