diff --git a/MagickCore/cipher.c b/MagickCore/cipher.c
index f006526..314e83a 100644
--- a/MagickCore/cipher.c
+++ b/MagickCore/cipher.c
@@ -641,7 +641,7 @@
   */
   quantum_type=GetQuantumType(image,exception);
   pixels=GetQuantumPixels(quantum_info);
-  image_view=AcquireCacheView(image);
+  image_view=AcquireAuthenticCacheView(image,exception);
   for (y=0; y < (ssize_t) image->rows; y++)
   {
     register ssize_t
@@ -847,7 +847,7 @@
   */
   quantum_type=GetQuantumType(image,exception);
   pixels=GetQuantumPixels(quantum_info);
-  image_view=AcquireCacheView(image);
+  image_view=AcquireAuthenticCacheView(image,exception);
   for (y=0; y < (ssize_t) image->rows; y++)
   {
     register ssize_t