Data encryption basics in Unity - Mini Project: Build & Apply

Data encryption basics

📖 Scenario: You are building a simple Unity game that needs to save player scores securely. To keep scores safe, you will encrypt the score data before saving it.

🎯 Goal: Create a Unity script that encrypts and decrypts a player's score using a basic encryption method.

📋 What You'll Learn

Create an integer variable called playerScore with the value 100

Create a string variable called encryptionKey with the value "key123"

Write a method called EncryptScore that takes playerScore and encryptionKey and returns an encrypted string

Write a method called DecryptScore that takes the encrypted string and encryptionKey and returns the original score as an integer

💡 Why This Matters

🌍 Real World

Encrypting player data helps protect game progress and scores from cheating or tampering.

💼 Career

Understanding basic encryption is useful for game developers and software engineers to secure sensitive data.

1

Set up player score variable

Create an integer variable called playerScore and set it to 100 inside a Unity MonoBehaviour class.

Unity

using UnityEngine;

public class ScoreEncryption : MonoBehaviour
{
    // Create playerScore variable
    // Your code here
}

Need a hint?

Use int playerScore = 100; inside the class but outside any method.

2

Add encryption key variable

Add a string variable called encryptionKey and set it to "key123" inside the ScoreEncryption class.

Unity

using UnityEngine;

public class ScoreEncryption : MonoBehaviour
{
    int playerScore = 100;
    // Create encryptionKey variable
    // Your code here
}

Need a hint?

Use string encryptionKey = "key123"; inside the class but outside any method.

3

Create EncryptScore method

Write a method called EncryptScore that takes an integer score and a string key, and returns a string. Use a simple encryption by converting the score to a string and appending the key.

Unity

using UnityEngine;

public class ScoreEncryption : MonoBehaviour
{
    int playerScore = 100;
    string encryptionKey = "key123";

    // Write EncryptScore method
    // Your code here
}

Need a hint?

Define EncryptScore to return score.ToString() + key.

4

Create DecryptScore method

Write a method called DecryptScore that takes a string encrypted and a string key, removes the key from the end of encrypted, and returns the original score as an integer.

Unity

using UnityEngine;

public class ScoreEncryption : MonoBehaviour
{
    int playerScore = 100;
    string encryptionKey = "key123";

    string EncryptScore(int score, string key)
    {
        return score.ToString() + key;
    }

    // Write DecryptScore method
    // Your code here
}

Need a hint?

Use Substring to remove the key and int.Parse to convert back to integer.