Role-based access control (RBAC) in Cybersecurity - Step-by-Step Execution

Concept Flow - Role-based access control (RBAC)

User requests access

↓

System checks user role

↓

Match role to permissions

↓

Permission granted?

No→Access denied

Yes↓

Allow user to perform action

The system checks the user's role, matches it to allowed permissions, and grants or denies access accordingly.

Execution Sample

Cybersecurity

User role: Editor
Requested action: Edit document
Check permissions for Editor
Permission found: Yes
Access granted

This example shows how a user with the Editor role is allowed to edit a document based on their permissions.

Analysis Table

Step	User Role	Requested Action	Permission Check	Access Result
1	Viewer	Read document	Viewer can read	Access granted
2	Viewer	Edit document	Viewer cannot edit	Access denied
3	Editor	Edit document	Editor can edit	Access granted
4	Editor	Delete document	Editor cannot delete	Access denied
5	Admin	Delete document	Admin can delete	Access granted
6	Guest	Read document	Guest cannot read	Access denied

💡 Access is granted only if the user's role includes permission for the requested action.

State Tracker

Variable	Start	After Step 1	After Step 2	After Step 3	After Step 4	After Step 5	After Step 6
User Role	None	Viewer	Viewer	Editor	Editor	Admin	Guest
Requested Action	None	Read document	Edit document	Edit document	Delete document	Delete document	Read document
Permission Check	None	Allowed	Denied	Allowed	Denied	Allowed	Denied
Access Result	None	Granted	Denied	Granted	Denied	Granted	Denied

Key Insights - 3 Insights

Why does a Viewer role get denied when trying to edit a document?

Because the Viewer role only has permission to read documents, not edit them, as shown in execution_table row 2.

Can an Editor delete a document?

No, the Editor role lacks delete permission, so access is denied as seen in execution_table row 4.

Why is the Admin role allowed to delete documents?

Admins have full permissions including delete, so access is granted as shown in execution_table row 5.

Visual Quiz - 3 Questions

Look at the execution_table, what is the Access Result for a Viewer trying to edit a document?

A Access denied

B Permission unknown

C Access granted

D Access pending

💡 Hint

Check execution_table row 2 under Access Result column.

At which step does the Admin role get permission to delete a document?

A Step 3

B Step 4

C Step 5

D Step 6

💡 Hint

Look at execution_table row 5 for Admin role and Delete document action.

If the Guest role was given read permission, how would the Access Result change at Step 6?

A It would remain Access denied

B It would change to Access granted

C Permission Check would be Denied

D Requested Action would change

💡 Hint

Refer to variable_tracker for Permission Check and Access Result at Step 6.

Concept Snapshot

Role-based access control (RBAC) assigns permissions to roles.
Users get access based on their role.
System checks role permissions before allowing actions.
Access is granted only if role includes needed permission.
Common roles: Admin, Editor, Viewer, Guest.
RBAC simplifies managing who can do what.

Full Transcript

Role-based access control (RBAC) works by assigning permissions to roles rather than individual users. When a user requests access to perform an action, the system checks the user's role and matches it to the permissions assigned to that role. If the role includes permission for the requested action, access is granted; otherwise, it is denied. For example, a Viewer role can read documents but cannot edit them, while an Admin role has full permissions including deleting documents. This method simplifies managing access by grouping permissions into roles and assigning users to those roles.