Update app_og.py

app_og.py

@@ -3,6 +3,9 @@ from Crypto.PublicKey import RSA
 from Crypto.Random import get_random_bytes
 from Crypto.Cipher import AES, PKCS1_OAEP
 from Crypto.Hash import RIPEMD160, SHA256
+from Crypto.Signature import pkcs1_15
+import binascii
+
 import base58
 import stegan
 import stegan2