add: secure code

Author: sleepycat666

test_insecure_crypto.py

@@ -1,4 +1,6 @@
-def encrypt():
-    print("This is insecure!")
+import hashlib
+
+m = hashlib.sha256()
+m.update(b"This is secure code because it uses official libraries.")
+m.digest()
 
-encrypt()