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<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
Compare access control list.
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