diff --git a/source/sat/util.py b/source/sat/util.py
index e3ca8ce..5adc7ab 100644
--- a/source/sat/util.py
+++ b/source/sat/util.py
@@ -119,13 +119,9 @@ def base_datos():
 
 
 def _get_cert(data):
-    key = b''
-    pem = b''
-    cer = data['path_cer'].read_bytes()
-    if data['path_enc'].is_file():
-        key = data['path_enc'].read_bytes()
-    elif data['path_pem'].is_file():
-        pem = data['path_pem'].read_bytes()
+    key = data['path_enc']
+    pem = data['path_pem']
+    cer = data['path_cer']
     cert = SATCertificate(cer, key, pem)
     return cert