Dude, what's your problem? Are you trolling? > A capability (known in some systems as a key) is a communicable, unforgeable token of authority. That's verbati

Dude, what's your problem? Are you trolling? > A capability (known in some systems as a key) is a communicable, unforgeable token of authority. That's verbatim the second sentence on Wikipedia! That's not "an implementation detail", it's core of the whole concept. > Capability-based security is to be contrasted with an approach that uses traditional UNIX permissions and Access Control Lists. > Although most operating systems implement a facility which resembles capabilities, they typically do not provide enough support to allow for the exchange of capabilities among possibly mutually untrusting entities to be the primary means of granting and distributing access rights throughout the system. A capability-based system, in contrast, is designed with that goal in mind.