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Beginner Topic 9 of 51 Security & Cryptography

Principle of Least Privilege

Granting only the access needed to do a task.

How it works

The principle of least privilege says every user, program and process should have only the minimum access needed to perform its function, and for only as long as necessary. It limits the damage from mistakes, compromised accounts and malware, since an attacker inherits the permissions of what they compromise. Implementation uses role-based access, separate admin and regular accounts, narrowly scoped API tokens, read-only database users, containers without root and just-in-time access.

Step-by-step walkthrough

  1. Every user and program gets only the access it needs.
  2. An admin account is used rarely.
  3. Developers get access to their own systems.
  4. Reporting jobs get read-only access.
  5. If one account is compromised the damage is limited.

Where it is used

Cloud IAM policies, operating-system permissions, database grants, service accounts and mobile app permissions apply it.

Common pitfall

Privileges tend to accumulate over time, called privilege creep, as people change roles. Overly broad wildcard policies and shared admin accounts are common. Too strict controls without a process for requests push people to workarounds. Review access regularly, automate expiry and log privileged actions.

Where it fits in the course

Principle of Least Privilege is topic 9 of 51 in Security & Cryptography, rated Beginner. It follows Social Engineering. The next topic is Authentication vs Authorization.

Practice and explore

How to study this topic

  1. Read the explanation above and restate the definition in your own words.
  2. Open the interactive lesson and answer its mini quiz.
  3. Read the common pitfall, then write a short example that avoids it.
  4. Check your understanding in the Security & Cryptography quiz, and revisit the topic if you miss a question.

Frequently asked questions

What is Principle of Least Privilege?
Granting only the access needed to do a task. It belongs to Security & Cryptography and is a beginner-level topic.
Where do people use Principle of Least Privilege?
Cloud IAM policies, operating-system permissions, database grants, service accounts and mobile app permissions apply it.
What is the most common mistake with Principle of Least Privilege?
Privileges tend to accumulate over time, called privilege creep, as people change roles.
What should I learn before this topic?
Start with Social Engineering, the topic just before it in Security & Cryptography.
How can I practice it?
Answer the mini quiz in the interactive lesson, then take the Security & Cryptography quiz.
Is Principle of Least Privilege hard to learn?
It is a Beginner topic, so it works as an entry point. If the terms are new, read the explanation twice and try the visualizer before the quiz.
How long does it take to learn Principle of Least Privilege?
Most learners can read the explanation and finish the interactive lesson in under an hour. Fluency comes from applying the idea, so plan a few short practice sessions with the quiz.
Which topics are related to Principle of Least Privilege?
Social Engineering, Authentication vs Authorization, Phishing are closely connected. The full list is in the related topics section of this page.
What should I study after Principle of Least Privilege?
Continue with Authentication vs Authorization, the next topic in Security & Cryptography.

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