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Labs / Base64 Detective

  • Daily Challenge
  • Released 24 Jun 2025
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Daily Challenge

Base64 Detective - Web Inspection Challenge

Challenge Overview

Welcome to Base64 Detective! In this challenge, you'll become a web detective and uncover hidden information encoded in Base64 format. The challenge presents you with a web page that contains multiple layers of encoded data that need to be decoded to reveal the final flag.

Learning Objectives

  • Understanding Base64 encoding and decoding
  • Using browser developer tools for web inspection
  • Working with multiple layers of encoded data
  • Pattern recognition in web applications
  • Understanding how data can be hidden in plain sight

Challenge Details

The challenge presents you with a web page containing various elements. Your mission is to:

  1. Inspect the page source and find encoded data
  2. Decode the Base64 strings you discover
  3. Follow the trail of encoded information
  4. Extract the final flag from the decoded data

Technical Background

Base64 is a group of binary-to-text encoding schemes that represent binary data in an ASCII string format. It's commonly used in web applications to encode data that needs to be transmitted as text. Understanding how to decode Base64 is essential for web security testing and data analysis.

Required Skills

  • Basic understanding of Base64 encoding
  • Familiarity with browser developer tools
  • Ability to inspect HTML source code
  • Knowledge of web technologies and data encoding

Getting Started

  1. Open the challenge page in your web browser
  2. Use the browser's developer tools (F12 or right-click -> Inspect)
  3. Look for Base64 encoded strings in the page source
  4. Decode each string you find and analyze the results

Tips

  • Look carefully at all elements on the page
  • Check HTML attributes, comments, and hidden elements
  • Use online Base64 decoders or browser console
  • Follow the trail of decoded information
  • Pay attention to patterns in the decoded data

Success Criteria

You will know you've solved the challenge when:

  • You've found and decoded all the Base64 strings
  • You've followed the complete trail of encoded information
  • You've extracted the final flag from the decoded data
  • You understand how the data was organized and encoded