Which layer of the Defense in Depth framework is primarily concerned with data security?

The layer of the Defense in Depth framework primarily concerned with data security is the Data layer. This layer focuses on protecting data throughout its lifecycle, which includes the stages of creation, storage, transmission, and deletion. Various security measures are implemented in this layer to ensure data confidentiality, integrity, and availability.

For instance, encryption is commonly used to protect sensitive data both at rest and in transit. Access controls are also implemented to restrict who can view or manipulate the data. Additionally, this layer encompasses practices like data classification and backup to mitigate the risks of data loss or unauthorized access.

The other layers serve different purposes in creating a comprehensive security posture but do not focus specifically on data security to the same extent. The Application layer is more focused on securing the software applications that users interact with, while the Perimeter layer encompasses security measures at the network edge, such as firewalls and intrusion detection systems. The Internal Network layer deals with security within the internal infrastructure but may not exclusively address data security concerns.