DB2 User Authentication and Authorization (Role-Based Access Control)
What is it?
User authentication and authorization (role and permission management) are processes that verify and control whether a user's operations in the system are legitimate. It includes user identification, identity verification, definition, and assignment of roles and permissions.
Why do we need to know this?
User authentication and authorization help ensure system security and effective operation. They prevent unauthorized users from operating on the system, thereby reducing system risks and vulnerabilities.
User Authentication and Authorization in DB2
In DB2, user authentication and authorization are critical components. The following is a process of user authentication and authorization in DB2:
1. User Identification
User identification refers to the process by which the system determines a user's identity. In DB2, various methods can be used for user identification, such as:
- Password: Compares credentials entered by users with pre-stored credentials.
- Kerberos Group Delegation: Kerberos group delegation is a key-based authentication protocol that allows the system to provide specific services based on the user's identity.
- Certificate Authentication: Verifies user identities through certificates.
2. Identity Verification
Identity verification refers to the process by which the system verifies the authenticity after identifying users. In DB2, various methods can be used for identity verification, such as:
- Password Validation: Validates whether entered credentials match pre-stored credentials.
- Key Authentication: Verifies the authenticity of keys.
3. Definition and Assignment of Roles and Permissions
Definition and assignment of roles and permissions refer to processes by which systems define and assign specific roles and permissions based on user identities. In DB2, various methods can be used for definition and assignment of roles and permissions, such as:
- System Users: Define one or more roles for each system user.
- External Users: Define one or more roles for external users.
Assignment of Roles and Permissions
In DB2, the following methods can be used to assign roles and permissions:
1. System User Roles
System user roles refer to roles created by a system manager. These roles typically have specific functional or operational permission, such as:
- SELECT: Can execute SELECT operations.
- INSERT: Can execute INSERT operations.
2. Internal User Roles
Internal user roles refer to roles created by the system manager. These roles typically have specific functional or operational permissions, such as:
- UPDATE: Can execute UPDATE operations.
- DELETE: Can execute DELETE operations.
3. External User Roles
External user roles refer to roles created by a system manager. These roles typically have specific functional or operational permissions, such as:
- VIEW: Can view data in the system.
- Execute: Can execute system commands.
Final Conclusion
User authentication and authorization (role and permission management) are key components of DB2 security and effectiveness. They ensure system safety and prevent unauthorized users from operating on the system.