Object-capability Systems
These operating systems are all engineered around a different paradigm of security, object-capabilities, where instead of having the system deciding if an access request should be granted (usually through one or several access control lists), the bundling of authority and designation makes it impossible to request anything not legitimate.
- KeyKOS
- EROS
- CapROS
- seL4
- Fiasco.OC
Read more about this topic: Security-focused Operating System
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