Insider Sabotage: Understanding SoD Access Matrix |…

What is Segregation of Duties (SoD)

Segregation of duties refers to the practice of dividing responsibilities within a process or system so that no single individual has complete control over all aspects. This principle is fundamental in preventing insider threats, where an employee with malicious intent could exploit their access to cause harm.

In cybersecurity, SoD ensures that even if one person gains unauthorized access, they cannot perform critical actions alone because those actions require multiple individuals or roles.

The Risk of Insider Sabotage

Insider sabotage occurs when an employee with legitimate access uses their privileges to cause harm. This can range from data theft and unauthorized system changes to more severe actions like damaging critical infrastructure.

The risk is particularly high in scenarios where a single individual holds both halves of a toxic permission pair, allowing them to perform harmful actions without external assistance.

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How the SoD Access Matrix Works

In the interactive 2D employee-by-permission access matrix, each cell represents an employee and their permissions. The risk level is visualized based on the combination of permissions held by employees.

A toxic permission pair consists of two permissions that together enable harmful actions. When one employee holds both halves of such a pair, they become a single point of failure, increasing the risk of insider sabotage.

Segregation of Duties Enforcement

Enforcing segregation of duties means dividing responsibilities so that no single individual can hold all critical permissions. This is typically achieved by assigning different roles to employees or implementing strict access controls.

The simulation demonstrates how segregation of duties collapses the risk of insider sabotage to zero, as it ensures that any harmful action requires multiple individuals or roles.

Frequently asked questions

What is a toxic permission pair?

A toxic permission pair consists of two permissions that together enable harmful actions. For example, the ability to modify data and approve changes can be combined in such a way that an individual with both permissions could cause significant damage.

How does segregation of duties prevent insider sabotage?

Segregation of duties prevents insider sabotage by ensuring that no single individual has complete control over critical processes or systems. This means that even if one person gains unauthorized access, they cannot perform harmful actions because those actions require multiple individuals or roles.

Can an employee still cause harm with segregated duties?

While segregation of duties significantly reduces the risk, it does not eliminate all risks. An employee could still attempt to exploit vulnerabilities in the system or collaborate with others who also have limited permissions.

How is SoD implemented in real-world systems?

SoD can be implemented through role-based access control (RBAC), where different roles are assigned specific permissions. This ensures that employees only have access to the information and functions necessary for their job, reducing the risk of insider threats.

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Everything above runs in your browser — open Insider Sabotage: SoD Access Matrix and change the parameters while it is running. Nothing is installed, nothing is uploaded, the whole model lives in one tab.

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