Git is powerful, but mistakes can expose secrets or create messy histories. Here’s how to use it securely and effectively. Version control is an essential part of modern software development, and Git is by far the most popular system. However,…
Treat all user input as hostile. Learn the best practices for validating and sanitizing input across different application layers. Why Input Validation Matters Insecure input is one of the most common ways attackers compromise systems. Whether it’s through a login…
Code is read more often than it’s written. Here’s how to write clean, maintainable code your future self (and team) will thank you for. Why Readable Code Matters Writing clean, readable code is not just a nice-to-have — it’s a…
Insecure login systems are one of the biggest causes of data breaches. Yet many developers still make avoidable mistakes — from storing plaintext passwords to skipping rate limits. In this lesson, we’ll break down what makes a login system secure,…
In today’s connected development world, developers constantly deal with API keys, database passwords, access tokens, and other sensitive credentials — often referred to as “secrets.” If these are handled poorly, they can be a goldmine for attackers. In this lesson,…
When it comes to securing web applications, authentication and authorization are often mentioned side by side — and just as often, they’re misunderstood or used interchangeably. While they work closely together, they serve very different purposes. Mixing them up can…
Learn how proper input validation can prevent major attacks like XSS, SQLi, and command injection. Why Input Validation Matters As a developer, one of the first (and most important) steps you can take to secure your application is to validate…