diff --git a/btv b/btv
index 1bf9113..c84665e 100755
--- a/btv
+++ b/btv
@@ -258,6 +258,9 @@ def serialize(snap, outdir, key, snap_from=None):
 	for file in os.listdir(directory):
 		path = os.path.join(directory, file)
 		os.chown(path, outdir_stat.st_uid, outdir_stat.st_gid)
+		
+		if path.endswith(".aes") or path.endswith(".sha512"):
+			os.chmod(path, 0o100)
 	
 	return 0