Security Fundamentals

A lightweight introduction to information security: from core principles like the CIA triad to cryptography, hashing, and access control.

1. 1

   Introduction to Information Security

   We cannot start a meaningful exploration of computer security without defining the subject itself. In this post, we'll talk about what security actually means.

   February 14, 2026
2. 2

   Foundations of Information Security - CIA Triad

   The CIA triad isn’t just a catchy acronym. It’s the backbone of security. We’ll break down confidentiality, integrity, and availability, and see how they shape the way we think about protecting systems and data. 

   February 15, 2026
3. 3

   Access Controls: Auth and Authz

   How do systems make sure the right people get in, and the wrong ones stay out? In this post, we’ll dig into authentication (proving who you are) and authorization (what you’re allowed to do). They’re simple ideas, but they have a massive impact on security.

   February 21, 2026
4. 4

   Fundamental security principles

   This post is all about the “big ideas” behind secure systems, like least privilege and separation of duties. These principles are surprisingly simple but form the backbone of how we design systems to stay safe from attacks.

   March 15, 2026
5. 5

   Introduction to cryptography

   Cryptography can feel intimidating, but don’t worry—we’ll keep it straightforward. This post is about understanding the basics: how we use cryptography to protect data and why it’s such a key part of security.

   September 4, 2026
6. 6

   Symmetric vs Asymmetric encryption

   Ever wonder how encryption actually works? Here, we’ll look at the two main approaches: symmetric, which is fast and straightforward, and asymmetric, which is a bit slower but incredibly powerful for secure communication.

   September 6, 2026
7. 7

   Hashing in cryptography

   Hashing is everywhere in security, and for good reason. It’s how we verify data integrity, secure passwords, and much more. In this post, we’ll unpack what makes hashing so useful and see it in action.

   September 7, 2026