What my Defense-In-Depth approach
The Defense-In-Depth approach is the multi-layered design of a security system to defend against attacks. The decisive factor here is that no single, isolated security measure is taken. Rather, multiple measures must be combined in such a way that if one measure fails or is overcome, the other measures compensate for the gap and continue to ensure the security of data processing.
This system was developed for military purposes, with a different objective in detail, and then applied to the concept of information security.
However, this risk-based approach can also be applied when planning comprehensive protection of data processing operations.