Javascript Obfuscation - Introduction

Introduction

This is the beginning of a series of blog post about Javascript obfuscation. Obfuscation in Javascript is a very interesting topic, because Javascript has a lot of special syntax and special behavior that can be abuse to produce totally unreadable code. Truly obfuscated code can be so dark that even tools like JS Beautifier won't help you to have a clue about what's going on. The only thing about Javascript obfuscation that is missing is places to find knowledge about it and this is why I am starting a series of blog post about it.

Everything in this series should be working in a modern browser (IE7 is not a modern browser) unless it's noted otherwise. If you see any mistake, you can leave me a comment or send me a message and I will correct it.

Parts

• The variables
• The strings
• The booleans
• The numbers
• Rewriting block of code
• Properties access
• Getting "window"