Chapter 4 Protecting Data
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Table of Contents
- Contents of a User's Security Profile
- Security Profile of Objects
- How the System Determines If a User Can Access a Protected Object
- Controlling Access with ACLs
- Using Identifier Access Control Entries (ACEs)
- Granting Access to Particular Users
- Preventing Users from Accessing an Object
- Limiting Access to a Device
- Limiting Access to an Environment
- Ordering ACEs Within a List
- Establishing an Inheritance Scheme for Files
- Displaying ACLs
- Adding ACEs to an Existing ACL
- Deleting an ACL
- Deleting ACEs from an ACL
- Replacing Part of an ACL
- Restoring a File's Default ACL
- Copying an ACL
- Controlling Access with Protection Codes
- Understanding Privileges and Control Access
- Auditing Protected Objects
This chapter extends the discussion of security design introduced in Chapter 2 “OpenVMS Security Model”. It describes how the operating system controls the way a user process or an application can access a protected object.
To summarize, the operating system controls access to any object that contains shareable information. These objects are known as protected objects. Devices, volumes, logical name tables, files, common event flag clusters, group and system global sections, resource domains, queues, capabilities, and security classes fall into this category. An accessing process carries credentials in the form of rights identifiers, and all protected objects list a set of access requirements specifying who has a right to access the object in a given manner.
This chapter:
Describes the types of identification the system assigns to processes to define their access rights to objects (“Contents of a User's Security Profile”)
Looks at the access controls that objects can hold (“Security Profile of Objects”)
Shows how the operating system processes access requests (“How the System Determines If a User Can Access a Protected Object”)
Explains how to control access to objects (Sections “Controlling Access with ACLs”, “Controlling Access with Protection Codes”, “Understanding Privileges and Control Access”, and “Auditing Protected Objects”)
Chapter 5 “Descriptions of Object Classes” describes the unique features of each class of protected object.