Update encryption.md
The main change is that there is no need to call ``spp.setPermissions(ap);`` as the access permission object is already set in the constructor of ``StandardProtectionPolicy``.
The other changes are minor enhancements:
- Added ``ap.setCanExtractContent(false);`` as another example of protection
- Added a few extra comments
diff --git a/content/2.0/cookbook/encryption.md b/content/2.0/cookbook/encryption.md
index 8370258..a850326 100644
--- a/content/2.0/cookbook/encryption.md
+++ b/content/2.0/cookbook/encryption.md
@@ -40,14 +40,18 @@
AccessPermission ap = new AccessPermission();
-// disable printing, everything else is allowed
+// disable printing,
ap.setCanPrint(false);
+//disable copying
+ap.setCanExtractContent(false);
+//Disable other things if needed...
// Owner password (to open the file with all permissions) is "12345"
// User password (to open the file but with restricted permissions, is empty here)
StandardProtectionPolicy spp = new StandardProtectionPolicy("12345", "", ap);
spp.setEncryptionKeyLength(keyLength);
-spp.setPermissions(ap);
+
+//Apply protection
doc.protect(spp);
doc.save("filename-encrypted.pdf");
