Explore web security fundamentals and their importance in this 45-minute conference talk from the Mozilla Developer Roadshow Asia. Delve into topics such as privacy concerns, certificate authorities, and secure communication methods. Learn about password authentication, two-factor verification, and disk encryption. Discover tools like Firefox Focus and gain insights into the interaction of web applications, local file encryption, and the Observatory project. Understand why web security matters to everyone and how it impacts internet users globally.