Capabilities and capability-based security

Capabilities and capability-based security performs compution at enourmous speed wirh 100% accuracy rate.It perform provides job repeatedly without dart and tired.It provides us information while can used in future for different purpose. the only exception is "at most one special type of capability system ",in which the manipulation of capabilites must be done by be believe hardware. A capability is defined to a protected object reference which, by virture of its possession by a user process. Capability-based security is a concept in the design of secure computing systems. A capability (known in some systems as a key) is a communicable, unforgivable token of authority. A user program on a capability-based operating system must use a capability to access an object. Capabilities are typically stored by the operating system in a list, with some mechanism in place to prevent the program from directly modifying the contents of the capability (so as to forge access rights or change the object it points to).At last , when a capability propagates between compartments, security policy and identities must be checked.