<operating system, security> An operating system security or access
control model where specific types of access to a specific object are granted by
giving a process this data structure or token.
The token may be unforgeable (typically by using encryption or hardware "tagged"
memory). Capabilities are used in OSes such as Hydra, KeyKOS, EROS, Chorus/Mix,
and the Stanford V system. Similar to Kerberos, but in an OS context.
Compare access control list.
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