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Decentralized Access Control is not typically recognized as a standard type of access control in the information security field. The other options—Mandatory Access Control, Role-Based Access Control, and Attribute-Based Access Control—are well-established models used to manage and restrict access to resources based on defined policies and user attributes.

Mandatory Access Control (MAC) enforces strict policies that dictate access permissions that cannot be altered by users, making it highly secure. Role-Based Access Control (RBAC) provides permissions based on the user's role within an organization, allowing for more flexible and manageable access configurations. Attribute-Based Access Control (ABAC) uses a set of attributes (e.g., user, resource, environmental conditions) to define access permissions, offering dynamic access decisions based on multiple factors.

In contrast, Decentralized Access Control is less commonly defined in the literature and does not align with the major access control models, which are more hierarchical and systematized. This distinction highlights the importance of recognizing established frameworks for managing access effectively.