diff --git a/QtPyNetwork/core/__init__.py b/QtPyNetwork/core/__init__.py
deleted file mode 100644
index e69de29..0000000
diff --git a/QtPyNetwork/core/crypto.py b/QtPyNetwork/core/crypto.py
deleted file mode 100644
index a31e549..0000000
--- a/QtPyNetwork/core/crypto.py
+++ /dev/null
@@ -1,21 +0,0 @@
-from cryptography.fernet import Fernet, InvalidToken
-
-
-def encrypt(message: bytes, key: bytes) -> bytes:
-    return Fernet(key).encrypt(message)
-
-
-def decrypt(data: bytes, key: bytes) -> bytes:
-    return Fernet(key).decrypt(data)
-
-
-def generate_key():
-    return Fernet.generate_key()
-
-
-def validate_key(key: bytes):
-    try:
-        Fernet._get_unverified_token_data(key)  # noqa
-        return True
-    except InvalidToken:
-        return False