LoRaEncryption

Data Encryption via LoRa transmission

A data encryption for communication between IoT devices (represented via LoRa).

Caution

Please note that the code and materials provided in this repository are intended for EDUCATIONAL purposes only and is NOT SAFE to be used in production.

Note

The Dev kit we will using in this project is Arduino Uno, with a EByte E32-433T20D in this project.

Table of Contents

• Background

• Algorithm using in this project

  • Build this project (Algorithm for Testing)

• Contributors

Background

In the realm of Internet of Things (IoT), secure communication between devices is paramount. LoRa (Long Range) technology offers a robust solution for long-distance, low-power communication, making it ideal for IoT applications. However, the inherent limitations of LoRa, such as low data rates and limited payload sizes, necessitate the use of lightweight encryption algorithms to ensure data security without compromising performance.

This project aims to implement and demonstrate data encryption techniques suitable for LoRa communication. We have chosen two classical encryption algorithms, the Caesar cipher and the Vigenère cipher, due to their simplicity and efficiency. These algorithms provide a basic level of security, making them suitable for educational purposes and lightweight applications where resource constraints are a concern.

The Caesar cipher is a substitution cipher where each letter in the plaintext is shifted a certain number of places down or up the alphabet. The Vigenère cipher, on the other hand, is a more complex polyalphabetic substitution cipher that uses a keyword to determine the shift for each letter in the plaintext. Both algorithms are implemented in this project to showcase their encryption and decryption processes.

Algorithm using in this project

Because of the limitation of the LoRa transmission, limitation of time, and the need for a lightweight encryption algorithm, we choose to use the Caesar cipher and the Vigenère cipher algorithm.

Build this project (Algorithm for Testing)

1. Clone the repository:

git clone https://github.com/l1ttled1no/LoRaEncryption

2. Build the project

Note

The shift in Caesar cipher can be modified in main.cpp file. The key in Vigenère cipher can be modified in main.cpp file.

First, build the main executable:

g++ -Ilib -o main main.cpp src/*.cpp

Then, run the executable with parameters:

./main [input_string]

For example:

> ./main hello world
Input: hello world
--------------Caesar Algorithm--------------  
Original text: hello world
Encrypted text: rovvy*"y|vn
Decrypted text: hello world
--------------Vigenere Algorithm--------------
Original text: hello world
Encrypted text: Uvaae!aQ
Decrypted text: hello world
>

Note

The string can have spaces and special characters, within the ASCII range of 32 to 126.

Contributors

@l1ttled1no (Main contributor).