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      In computer systems security, Relationship-based access control (ReBAC) defines an authorization paradigm where a subject's permission to access a resource is defined by the presence of relationships between those subjects and resources.
      In general, authorization in ReBAC is performed by traversing the directed graph of relationships. The nodes and edges of this graph are very similar to triples in the Resource Description Framework (RDF) data format. ReBAC systems allow hierarchies of relationships, and some allow more complex definitions that include algebraic operators on relationships such as union, intersection, and difference.
      ReBAC gained popularity with the rise of social network web applications, where users need to control their personal information based on their relationship with the data receiver rather than the receiver’s role. Using ReBAC enabled to collectively define permissions for teams and groups, thus eliminating the need to set permissions individually for every resource.
      In contrast to role-based access control (RBAC), which defines roles that carry a specific set of privileges associated with them and to which subjects are assigned, ReBAC (like ABAC), allows defining more fine-grained permissions. For example, if a ReBAC system defines resources of type document, which can allow one action editor, if the system contains the relationship ('alice', 'editor', 'document:budget'), then subject Alice can edit the specific resource document:budget. The downside of ReBAC is that, while it allows more fine-grained access, this means that the application may need to perform more authorization checks.
      ReBAC systems are deny-by-default, and allow building RBAC systems on top of them.


      History


      The term ReBAC was coined by Carrie E. Gates in 2006.
      In 2019 Google published a paper presenting "Zanzibar: Google’s Consistent, Global Authorization System". The paper defines a system composed of a namespace configuration and relationship data expressed as triples.
      Since the release of that paper, several companies have built commercial and open source offerings of ReBAC systems.


      See also


      Role-based access control
      Attribute-based access control


      References

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    What is Relationship Based Access Control (ReBAC)?

    What is Relationship Based Access Control (ReBAC)?

    Relationship-Based Access Control. | Download Scientific Diagram

    Relationship-Based Access Control. | Download Scientific Diagram

    Role-Based Access Control ERD - Darwin Biler

    Role-Based Access Control ERD - Darwin Biler

    Role-Based Access Control by Yoonah Bae on Dribbble

    Role-Based Access Control by Yoonah Bae on Dribbble

    Role Based Access Control

    Role Based Access Control

    Role Based Access Control

    Role Based Access Control

    Role Based Access Control

    Role Based Access Control

    Role Based Access Control

    Role Based Access Control

    Role Based Access Control for Data Teams- An A to Z Guide

    Role Based Access Control for Data Teams- An A to Z Guide

    ROLE-BASED ACCESS CONTROL | Download Scientific Diagram

    ROLE-BASED ACCESS CONTROL | Download Scientific Diagram

    What is Role-Based Access Control (RBAC)? | NordLayer Learn

    What is Role-Based Access Control (RBAC)? | NordLayer Learn

    What is Role-Based Access Control (RBAC)? | NordLayer Learn

    What is Role-Based Access Control (RBAC)? | NordLayer Learn

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    Relationship-based access control - Wikipedia

    In computer systems security, Relationship-based access control (ReBAC) defines an authorization paradigm where a subject's permission to access a resource is defined by the presence of relationships between those subjects and resources.

    How to Implement Relationship Based Access Control (ReBAC)

    Mar 8, 2024 · To better understand how Relationship-Based Access Control (ReBAC) functions in the real world, let's explore two scenarios that mimic everyday complexities. These examples will help illustrate how ReBAC excels in managing intricate access dynamics.

    What is Relationship-Based Access Control (ReBAC)? - Permit.io

    Aug 29, 2023 · Relationship-Based Access Control (ReBAC) extends RBAC by considering relationships between identities and resources. The consideration of these relationships allows us to create authorization policies for hierarchical structures.

    Authorization Academy - Relationship-Based Access Control (ReBAC)

    In this chapter, we’re going to talk about relationships and the notion of relationship-based access control or ReBAC. From an implementation standpoint, relationships look very much like roles. You can use relationships as a handy mental model for how to implement authorization and how to communicate it to your users.

    Relationship Based Access Control (ReBAC): The Ultimate Guide …

    Jan 11, 2024 · Relationship Based Access Control (ReBAC): The Ultimate Guide. Learn everything you need to know about ReBAC! We will examine ReBAC and cover its three highly-used models, explore the pros and cons, compare ReBAC with RBAC and ABAC, and show you how to implement ReBAC for your applications.

    Relationship-Based Access Control (ReBAC) Explained

    Mar 18, 2024 · Role-based access control (RBAC) is a security approach that authorizes and restricts system access to users based on their role(s) within an organization.

    Relationship-Based Access Control: What You Need to Know

    Discover the Relationship-Based Access Control (ReBAC) in cybersecurity. Bridge the gap between RBAC and ABAC with this versatile approach.

    What is Relationship Based Access Control (ReBAC)?

    Jul 5, 2021 · Relationship Based Access Control allows your relationships to influence the authorisation policy and grant access to protected resources.

    Relationship-based access control | Proceedings of the first ACM ...

    Feb 21, 2011 · Gates coined the term Relationship-Based Access Control (ReBAC) to refer to this paradigm. ReBAC is characterized by the explicit tracking of interpersonal relationships between users, and the expression of access control policies in terms of these relationships.

    Your Guide to Relationship-Based Access Control (ReBAC)

    Nov 21, 2023 · Relationship-Based Access Control (ReBAC) is an authorization model that helps organizations assign permissions based on the relationships between different entities. Entities can be anything in an organizational context – users, tenants, devices, or abstract entities like teams or groups.