How To Build a File Encryption App in Python

This project includes full source code, tutorial, and step-by-step instructions.

March 11, 2025

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This week, we’re sharing a new Python project, including source code and a step-by-step tutorial. We’re also going to cover how to create desktop apps with Python and PyQt, not to mention how to use Python sleep and how one forgotten hacker saved the Internet.

This Week’s Resources

New Python Project: Build a File Encryption App

We're pumped to share this new Python project with you! This time, we're building a File Encryption & Decryption app using AES encryption and password protection. It's a great way to explore cryptography fundamentals, strengthen file security, and design a user-friendly GUI with PyQt5.

By the end of this tutorial, you'll have a fully functional encryption tool that lets you securely protect your files from unauthorized access. You’ll learn how to implement strong encryption, manage passwords safely, and build an intuitive interface.

Follow along as we break it down step by step, and we’ll provide all the code so you can customize and expand the tool however you like. Let’s get started!

How to Build a Desktop App with Python

Want to build your own desktop application with Python? This step-by-step tutorial (less than 40 minutes) walks you through creating a fully functional PyQt app, using one of Python's most popular GUI frameworks

Specifically, the video covers:

  • Installing PyQt and setting up your development environment

  • Creating UI components and handling events with signals and slots

  • Arranging widgets with layouts for a structured interface

  • Implementing both procedural and OOP approaches for app design

  • Adding custom styling for a modern, polished look

And make sure to check out the upcoming walkthroughs. We’ve got a fun project that creates a Python password manager coming up soon.

We will have the full walkthrough, including the full source code for the project, on Hackr.io.

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Master The Python Sleep Method

Want to control execution timing in Python like a pro? We just released a complete guide to the Python Sleep function, covering everything from basic usage to real-world applications like countdown timers, digital clocks, and handling timeouts.

Specifically, this guide covers:

  • How to pause execution using sleep()

  • Using sleep() in loops, floating-point delays, and precise timing

  • Creating a countdown timer and a real-time digital clock

  • Measuring elapsed time and handling timeouts

  • Best practices for using sleep() effectively 

from time import sleep

print("Starting...")
sleep(3)  # Pauses execution for 3 seconds
print("Hello, World!")

The Python sleep() function is an essential tool for task scheduling, automation, and time-sensitive applications. Read the full guide to start applying it in your projects today!

How One Forgotten Hacker Saved the Internet

No, this isn’t about a sci-fi virus or a Hollywood hacker plot. This is the real story of Dan Kaminsky—the cybersecurity researcher who, in 2008, quietly discovered a fatal flaw in the internet’s foundation. A flaw so severe, it could have crippled the entire web if left unchecked.

Rather than exploiting it, Kaminsky worked behind the scenes, rallying experts to patch the vulnerability before disaster struck. His actions didn’t just save the internet—they redefined how we handle security threats and responsible disclosure today.

The Code Editor

Did you know about the free Python, HTML, and JavaScript code editor? Just log into your free account at Hackr.io to use them.

Microsoft’s Big Loss, Your Big Problem?

Microsoft is calling it a day with Skype. Here’s what that means for consumer trust in the tech market.

For many, Skype’s disappearance might seem inconsequential, an outdated relic from the early 2000s that Zoom, FaceTime, and WhatsApp had long overshadowed. But its demise underscores a growing problem: users have little control over the fate of digital services they depend on.

Microsoft’s decision follows a pattern seen across the tech industry. Google has shut down countless products, from Google Reader to Google Hangouts, sometimes with little warning.

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