This document introduces several security reference implementation models (RIMs) for the Remote GPU over APN use case, leveraging the security architectures discussed within the IOWN Global Forum. These RIMs illustrate how the two functional architectures—Functional Architecture for Protection of Data in Use: IOWN Privacy Enhancing Technologies (IOWN PETs) and Functional Architecture for Protection of Data in Motion: Multi-Factor Security Key Exchange and Management (MFS)—can be applied to fulfill the use case’s data security requirements.