diff --git a/docs/references/features-cross-reference.md b/docs/references/features-cross-reference.md
index cc58a4e4..ac53cfb4 100644
--- a/docs/references/features-cross-reference.md
+++ b/docs/references/features-cross-reference.md
@@ -460,6 +460,7 @@
 		<td></td>
 		<td></td>
 		<td></td>
+		<td></td>
 	</tr>
 	<tr>
 		<td style="padding-left: 1em;">Empty/NULL</td>
@@ -1487,6 +1488,60 @@
 		<td style="text-align: center; color: red;">✖</td>
 		<td style="text-align: center; color: red;">✖</td>
 	</tr>
+	<tr>
+		<td><strong>Security</strong></td>
+		<td style="text-align: center; color: orange;">●</td>
+		<td style="text-align: center; color: orange;">●</td>
+		<td style="text-align: center; color: red;">✖</td>
+		<td style="text-align: center; color: red;">✖</td>
+		<td style="text-align: center; color: red;">✖</td>
+		<td style="text-align: center; color: red;">✖</td>
+		<td style="text-align: center; color: red;">✖</td>
+		<td style="text-align: center; color: red;">✖</td>
+		<td style="text-align: center; color: red;">✖</td>
+		<td style="text-align: center; color: red;">✖</td>
+		<td style="text-align: center; color: red;">✖</td>
+		<td style="text-align: center; color: red;">✖</td>
+		<td style="text-align: center; color: red;">✖</td>
+		<td style="text-align: center; color: red;">✖</td>
+		<td style="text-align: center; color: red;">✖</td>
+	</tr>
+	<tr>
+		<td style="padding-left: 2em;">Protection (prevent editing)</td>
+		<td style="text-align: center; color: green;">✔</td>
+		<td style="text-align: center; color: green;">✔</td>
+		<td style="text-align: center; color: red;">✖</td>
+		<td style="text-align: center; color: red;">✖</td>
+		<td style="text-align: center; color: red;">✖</td>
+		<td style="text-align: center; color: red;">✖</td>
+		<td style="text-align: center; color: red;">✖</td>
+		<td style="text-align: center; color: green;">✔</td>
+		<td style="text-align: center; color: green;">✔</td>
+		<td style="text-align: center; color: red;">✖</td>
+		<td style="text-align: center; color: red;">✖</td>
+		<td style="text-align: center; color: red;">✖</td>
+		<td style="text-align: center; color: red;">✖</td>
+		<td>$sheet->getProtection()</td>
+		<td>$sheet->getProtection()->setSheet(true)</td>
+	</tr>
+	<tr>
+		<td style="padding-left: 2em;">Encryption (prevent viewing)</td>
+		<td style="text-align: center; color: green;">✔</td>
+		<td style="text-align: center; color: red;">✖</td>
+		<td style="text-align: center; color: red;">✖</td>
+		<td style="text-align: center; color: red;">✖</td>
+		<td style="text-align: center; color: red;">✖</td>
+		<td style="text-align: center; color: red;">✖</td>
+		<td style="text-align: center; color: red;">✖</td>
+		<td style="text-align: center; color: red;">✖</td>
+		<td style="text-align: center; color: red;">✖</td>
+		<td style="text-align: center; color: red;">✖</td>
+		<td style="text-align: center; color: red;">✖</td>
+		<td style="text-align: center; color: red;">✖</td>
+		<td style="text-align: center; color: red;">✖</td>
+		<td></td>
+		<td></td>
+	</tr>
 	<tr>
 		<th></th>
 		<th>XLS</th>