Fast Cryptor

Abstract

1. Introduction

We introduced a BUFFER_SIZE constant to determine the size of the buffer used for reading and processing file data. Adjust this value based on your specific requirements. The file encryption process now reads and processes the input file in chunks, reducing the number of I/O operations. It uses a buffer to read and write data efficiently. Encryption progress is no longer displayed for each file individually but instead shows a message when a file is successfully encrypted.

This project contains a pair of C++ programs for encrypting and decrypting files using the XOR cipher. The programs are designed to be fast and efficient, and can encrypt/decrypt entire directories, including subdirectories. The programs are written in C++ and are cross-platform. The programs are designed to be used in the terminal. I also added compile.sh and compile.bat to compile the programs.

For Windows: just double click the compile.bat file

2. Objective

Fast XOR File Encryption/Decryption

This project demonstrates how C++ can be applied to a real-world Cybersecurity & Ethical Hacking problem.

3. Key Features / Modules

• Encrypts files using a key.
• Decrypts files encrypted using the encryption program.
• Can encrypt/decrypt entire directories, including subdirectories.

4. Technology Stack

5. System Requirements

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

• Arduino IDE / PlatformIO or a C++ compiler (g++)
• Target board (e.g. Arduino, ESP32) where applicable
• Git (to clone the repository)

6. Installation & Setup

git clone https://github.com/Falcn8/FastCryptor.git
cd FastCryptor

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 Falcn8 and published on GitHub under the MIT License. Please follow the license terms and credit the original author when you use or modify this code.