Security Across Multiple Clouds
Multi-cloud is now a standard business strategy. The hybrid cloud market is expected to reach $97.64 billion by 2023, and 81% of enterprises already use more than one cloud.
Each cloud provider has good security tools, but they only work inside that provider's environment. Once you run on two or three clouds, that becomes the main problem. I see it in four areas.
Governance and visibility
Each platform has its own tools, like AWS CloudTrail or Azure audit logs. Policies have to be replicated by hand on each platform, and nobody has a view across all of them.
Security design
Each provider needs its own architecture. Integrating the different security controls is complex, and keeping them coordinated across platforms is manual work.
Tool selection
Tools that work with one provider may not work with another. Data formats and standards differ, integration options are limited, and pricing is hard to predict.
The team
Each platform needs its own expertise. Training takes time, and knowledge ends up split between people who each know one cloud.
What to do
I recommend starting with the foundation:
- unified logging and monitoring across all platforms,
- visibility across platforms,
- consistent security baselines.
After that:
- Centralized traffic management, so threats are detected and handled the same way on every platform.
- Identity management that applies the same access control everywhere.
- Event correlation across platforms, so an attack that touches two clouds shows up as one incident, not two.
- Cross-platform skills in the team, with operations assisted by automation where possible.
The aim is to replace a set of separate security setups, one per cloud, with one system that covers all of them.