Calculator Hide Files

Abstract

1. Introduction

The Calculator Hide File App is an innovative Android file-hiding app that disguises itself as a fully functional calculator. It helps you securely store private files and protect them with a hidden passcode.

The Calculator Hide File App is an open-source application, allowing you to inspect the code yourself. This ensures complete transparency and guarantees that your privacy remains uncompromised.

2. Objective

Open-source Android vault app to hide photos, videos, audio, notes & documents securely with AES encryption

This project demonstrates how Kotlin, Android can be applied to a real-world Cybersecurity & Ethical Hacking problem.

3. Key Features / Modules

• Dual Functionality - A working calculator & a file vault in one app.
• Secret Passcode - Unlock hidden files by entering a secret code.
• Secure File Manager - Hide/Unhide files easily.
• Fast & Lightweight - Smooth performance on all Android devices.
• No Root Required - Works without rooting your phone.
• Security - Encrypt & Decrypt files.

4. Technology Stack

• Programming Language: Kotlin
• UI Framework: XML
• File Storage: Secure internal storage & MediaStore API

5. System Requirements

General requirements for this technology stack — check the README for exact versions.

• Android Studio (latest)
• JDK 17
• Android device or emulator
• Git (to clone the repository)

6. Installation & Setup

git clone https://github.com/Binondi/Calculator-Hide-Files.git
cd Calculator-Hide-Files

1. Open Android Studio and build the project.
2. Install the APK on your Android device or emulator.

git clone https://github.com/Binondi/Calculator-Hide-Files.git

Full setup instructions are in the project README.

7. Future Enhancements

Suggested extensions you can add to make this your own project.

• Add logging and alert notifications (email / Telegram)
• Write a threat model document for the tool
• Package it with Docker for safe lab testing

8. Viva / Review Questions

Common questions examiners ask for projects in this domain.

1. Which threat or attack does this project defend against?
2. What detection or protection technique is used and what are its limits?
3. How are false positives and false negatives handled?
4. Which cryptographic algorithms or security standards are involved?
5. What legal and ethical rules apply when testing a tool like this?

9. Source Code & License

This project is developed by Binondi and published on GitHub under the Apache License 2.0. Please follow the license terms and credit the original author when you use or modify this code.