Merge pull request #1748 from Abhinavcode13/patch-5

Added the File Encryption/Decryption script

Author: Yashbhadiyadra

File Encryption/Decryption script/README.md

@@ -0,0 +1,49 @@
+# File Downloader Script
+
+
+This script is about file encryption and decryption using the Fernet symmetric encryption algorithm from the cryptography library in Python.
+
+The script provides functions to generate an encryption key, load the key from a file, encrypt a specified file, and decrypt a previously encrypted file.
+
+<br>
+
+## Instructions 📝
+
+### Step 1:
+
+	Make sure you have Python installed on your system. You can download and install Python from the official Python website (https://www.python.org).
+
+### Step 2:
+
+    Open a text editor and copy the script provided in the previous response into a new file.
+
+
+
+### Step 3:
+
+    Save the file with a .py extension, such as file_encryption.py
+
+
+### Step 4:
+
+	Open a terminal or command prompt and navigate to the directory where you saved the Python script.
+
+
+### Step 5:  
+
+    Check the Output: The script will attempt to download the file from the specified URL and save it to the destination path. You will see either a success message or a failure message displayed in the command prompt or terminal, depending on the outcome of the download operation.
+
+
+### Step 6:      
+
+    If you haven't generated a key before, uncomment the generate_key() line in the script by removing the # character at the beginning of the line. This line should only be executed once to generate the key. After generating the key, you can comment out the generate_key() line again by adding the # character.
+
+### step 7:
+
+    Run the script again (python file_encryption.py) to encrypt the file specified in the file_to_encrypt variable. It will print a success message when the encryption is complete.
+
+### step 8:
+    To decrypt the file, run the script once more (python file_encryption.py). It will use the same key to decrypt the file, and print a success message when the decryption is complete.    
+
+<hr>
+

File Encryption/Decryption script/file_encryption.py

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+from cryptography.fernet import Fernet
+
+
+def generate_key():
+    key = Fernet.generate_key()
+    with open("key.key", "wb") as key_file:
+        key_file.write(key)
+
+
+def load_key():
+    with open("key.key", "rb") as key_file:
+        key = key_file.read()
+    return key
+
+
+def encrypt_file(file_path, key):
+    cipher = Fernet(key)
+    with open(file_path, "rb") as file:
+        file_data = file.read()
+    encrypted_data = cipher.encrypt(file_data)
+    with open(file_path, "wb") as file:
+        file.write(encrypted_data)
+
+
+def decrypt_file(file_path, key):
+    cipher = Fernet(key)
+    with open(file_path, "rb") as file:
+        encrypted_data = file.read()
+    decrypted_data = cipher.decrypt(encrypted_data)
+    with open(file_path, "wb") as file:
+        file.write(decrypted_data)
+
+
+# Generate a new key (run this only once)
+# generate_key()
+
+# Load the key
+key = load_key()
+
+# Encrypt a file
+file_to_encrypt = "example.txt"
+encrypt_file(file_to_encrypt, key)
+print("File encrypted successfully!")
+
+# Decrypt the file
+file_to_decrypt = "example.txt"
+decrypt_file(file_to_decrypt, key)
+print("File decrypted successfully!")

SCRIPTS.md

@@ -98,4 +98,6 @@
 |94\.      | Linked List | Linked List data Scripts are used to store and manage a collection of elements in a dynamic and flexible manner | [Take Me](./Linked%20List/) | [Himanshu Agarwal](https://github.com/himanshu-03)
 | 95\.     | Searching Techniques | Searching techniques are scripts used to find a specific element or value within a collection of data. | [Take Me](./Searching%20Techniques/) | [Himanshu Agarwal](https://github.com/himanshu-03)
 | 96\.     | Sorting Techniques | Sorting techniques are scripts that arrange a collection of data elements in a particular order, typically ascending or descending. | [Take Me](./Sorting%20Techniques/) | [Himanshu Agarwal](https://github.com/himanshu-03)
+| 99\.     | File Organizer script | A File Organizer script is a program or script that automates the process of organizing files within a directory or multiple directories | [Take Me](./File Organizer script/) | [Abhinav kumar](https://github.com/Abhinavcode13)
+| 100\.     | File Encryption/Decryption script | A File Organizer script is a program or script that automates the process of organizing files within a directory or multiple directories | [Take Me](./File Encryption/Decryption script/) | [Abhinav kumar](https://github.com/Abhinavcode13)