The object-capability model is a computer security model. A capability describes a transferable right to perform one (or more) operations on a given object. It can be obtained by the following combination:
An unforgeable reference (in the sense of object references or protected pointers) that can be sent in messages.
The object-capability model is a computer security model. A capability describes a transferable right to perform one (or more) operations on a given object. It can be obtained by the following combination:
An unforgeable reference (in the sense of object references or protected pointers) that can be sent in messages. page 
Image Ian Phillips‏ @beanbaglabs
Mark Miller talks about economics and object capability systems at #ecoop16 page
Awesome Object Capabilities and Capability-based Security page