+            def decrypt_url(f_url):
+                for k in (key, 'IFYOUWANTTHEARTISTSTOGETPAIDDONOTDOWNLOADFROMMIXCLOUD'):
+                    decrypted_url = self._decrypt_xor_cipher(k, f_url)
+                    if re.search(r'^https?://[0-9a-z.]+/[0-9A-Za-z/.?=&_-]+$', decrypted_url):
+                        return decrypted_url
+