diff --git a/.idea/misc.xml b/.idea/misc.xml
index 5403b9e..f8a22e9 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -1,4 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="Black">
+    <option name="sdkName" value="Python 3.13" />
+  </component>
   <component name="ProjectRootManager" version="2" project-jdk-name="Python 3.13" project-jdk-type="Python SDK" />
 </project>
\ No newline at end of file
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
index d843f34..94a25f7 100644
--- a/.idea/vcs.xml
+++ b/.idea/vcs.xml
@@ -1,4 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="VcsDirectoryMappings" defaultProject="true" />
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
 </project>
\ No newline at end of file
diff --git a/encryption_utils.py b/encryption_utils.py
index 3b70510..92f0d6b 100644
--- a/encryption_utils.py
+++ b/encryption_utils.py
@@ -1,7 +1,7 @@
 from Crypto.PublicKey import RSA
 from Crypto.Cipher import PKCS1_OAEP, AES
 from Crypto.Random import get_random_bytes
-
+from Crypto.Hash import SHA256
 
 class AsymmetricEncryption:
     def __init__(self):
@@ -21,7 +21,6 @@ class AsymmetricEncryption:
         cipher_rsa = PKCS1_OAEP.new(self.key_pair)
         return cipher_rsa.decrypt(encrypted_data)
 
-
 class SymmetricEncryption:
     def encrypt(self, data, key):
         cipher_aes = AES.new(key, AES.MODE_GCM)
@@ -32,3 +31,7 @@ class SymmetricEncryption:
     def decrypt(self, nonce, ciphertext, tag, key):
         cipher_aes = AES.new(key, AES.MODE_GCM, nonce=nonce)
         return cipher_aes.decrypt_and_verify(ciphertext, tag)
+
+def calculate_file_hash(file_data):
+    hash_obj = SHA256.new(file_data)
+    return hash_obj.digest()
diff --git a/example.txt b/example.txt
index a47e663..76b02a3 100644
--- a/example.txt
+++ b/example.txt
@@ -1,2 +1,2 @@
 123456
-adgjl
\ No newline at end of file
+asdfghjkl
\ No newline at end of file
diff --git a/file_transfer.py b/file_transfer.py
new file mode 100644
index 0000000..b6b664f
--- /dev/null
+++ b/file_transfer.py
@@ -0,0 +1,78 @@
+import socket
+import threading
+from Crypto.PublicKey import RSA
+from Crypto.Cipher import AES, PKCS1_OAEP
+from Crypto.Random import get_random_bytes
+from Crypto.Hash import SHA256
+
+class FileTransferApp:
+    def __init__(self, host, port):
+        self.host = host
+        self.port = port
+        self.private_key = None
+        self.public_key = None
+        self.running = True
+
+    def generate_keys(self):
+        key = RSA.generate(2048)
+        self.private_key = key.export_key()
+        self.public_key = key.publickey().export_key()
+
+    def send_file(self, filepath, receiver_host):
+        try:
+            with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
+                s.connect((receiver_host, self.port))
+                sender = Sender(filepath, receiver_public_key=self.public_key)
+                data_to_send = sender.send_file()
+                s.sendall(data_to_send)
+                print("File sent successfully.")
+        except Exception as e:
+            print(f"An error occurred while sending the file: {e}")
+
+    def receive_file(self):
+        try:
+            with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
+                s.bind((self.host, self.port))
+                s.listen()
+                print(f"Server listening on {self.host}:{self.port}")
+                conn, addr = s.accept()
+                with conn:
+                    print(f"Connected by {addr}")
+                    data = b''
+                    while True:
+                        packet = conn.recv(1024)
+                        if not packet:
+                            break
+                        data += packet
+                    receiver = Receiver(private_key=self.private_key)
+                    decrypted_data = receiver.receive_file(data)
+                    if decrypted_data:
+                        # Save or process the decrypted file data
+                        with open('received_file', 'wb') as f:
+                            f.write(decrypted_data)
+                        print("File received and decrypted successfully.")
+        except Exception as e:
+            print(f"An error occurred while receiving the file: {e}")
+
+    def run(self):
+        while self.running:
+            command = input("Enter 'generate_keys' to generate keys, 'send' to send a file, 'receive' to receive a file, or 'exit' to quit: ").strip().lower()
+            if command == 'generate_keys':
+                self.generate_keys()
+                print("Keys generated successfully.")
+            elif command == 'send':
+                filepath = input("Enter the path of the file to send: ")
+                receiver_host = input("Enter the receiver's host (IP address): ")
+                threading.Thread(target=self.send_file, args=(filepath, receiver_host)).start()
+            elif command == 'receive':
+                threading.Thread(target=self.receive_file).start()
+            elif command == 'exit':
+                self.running = False
+                print("Exiting application.")
+                break
+            else:
+                print("Invalid command.")
+
+if __name__ == "__main__":
+    app = FileTransferApp(host='0.0.0.0', port=65432)
+    app.run()