CASP+ Definitions: Deperimeterization & Zero Trust
Deperimeterization and Zero Trust are concepts related to cybersecurity that aim to address the limitations of traditional perimeter-based security models.
Deperimeterization refers to the removal or erosion of the traditional network perimeter that separates the internal network from the external network or the internet. This is due to several factors, including the increased adoption of cloud computing, mobile devices, and the rise of remote workers. With deperimeterization, the security perimeter is no longer limited to the network boundary, but is extended to cover individual devices, applications, and data, regardless of their location.
Zero Trust is a security model that assumes that all network traffic, both internal and external, is potentially malicious and should not be trusted by default. In the Zero Trust model, access to resources is granted based on the principle of least privilege, which means that users are only given access to the resources they need to perform their job functions, and nothing more. This requires strict access controls and authentication mechanisms to ensure that only authorized users and devices are allowed to access sensitive data and applications. Zero Trust also involves continuous monitoring and analysis of network traffic and user behavior to detect any suspicious activity that may indicate a security threat.
Overall, deperimeterization and Zero Trust represent a shift away from the traditional perimeter-based security model towards a more dynamic, distributed, and adaptive approach to cybersecurity that focuses on protecting the assets themselves, rather than relying solely on network boundaries for protection.
