A Consideration of Scalability for Software Defined Perimeter Based on the Zero-trust Model

Software Defined Perimeter (SDP), a zero trust model developed by Cloud Security Alliance, has been attracted attention in the technological industry since its introduction to a world adapting to digital transformation. The SDP market is expected to grow from USD 3,141 million in 2019 to USD 10,613.87 million by 2025 globally at a Compound Annual Growth Rate (CAGR) of 22.49% during the forecast period. Many trust models have been introduced since the realization for the need of cyber security, such as public key infrastructure, software defined network, and virtual private network. SDP gained importance as a zero trust model since in the digital world no one can be trusted. With the introduction of new models and technical devices, there arises the need to improve newly introduced technology on various grounds when customers adapt to devices. Hence, we discussed overcoming current issues of SDP of scalability, reliability, and usability, etc. With the number of organizations sharing information online expanding, there is need for scalable and reliable SDP that is easy to maintain and cost efficient for evolving organizations. Thus, we newly proposed several scalable SDP models that enable easier installation management of real networks of organizations with different organizational structures.