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Users can pin pictures and ________ to their Pinterest pinboards

Fill in the blank(s) with correct word

Describe each of the following four kinds of access control mechanisms in terms of (a) ease of determining authorized access during execution, (b) ease of adding access for a new subject, (c) ease of deleting access by a subject, and (d) ease of creating a new object to which all subjects by default have access.

1. Per-subject access control list (that is, one list for each subject tells all the objects to which that subject has access) 2. Per-object access control list (that is, one list for each object tells all the subjects who have access to that object) 3. Access control matrix 4. Capability