[en] The Generation IV International Forum (GIF) emphasizes proliferation resistance and physical protection (PR&PP) as one of the main aspects to be considered regarding future nuclear energy systems (NESs). It was refined over the years through several case studies. This paper presents the current status of PRPPEM, researches that KAERI has done, and future WG's activities to update them. The experience in the process of developing and testing the PRPPEM formed the basis for a close interaction with the GIF SSCs/pSSCs in 2011 and gave light to a joint document which is emphasizing the PR and PP characteristics of the six GIF reactor technologies. This activity will not only shed light on PR and PP advancements of the current system designs, but also inform the PRPPWG future activities. The experience in the process of developing and testing the PRPPEM formed the basis for a close interaction with the GIF SSCs/pSSCs in 2011 and gave light to a joint document which is emphasizing the PR&PP characteristics of the six GIF reactor technologies. This activity will not only shed light on PR&PP advancements of the current system designs, but also inform the PRPPWG future activities.