hapter-item expanded "><a href="../../chapter_13/13.3/13.3.7.html"><strong aria-hidden="true">13.3.7.</strong> Examples of Flash Encryption and NVS Encryption</a></li></ol></li><li class="chapter-item expanded "><a href="../../chapter_13/13.4/index.html"><strong aria-hidden="true">13.4.</strong> Data Legitimacy Protection</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../../chapter_13/13.4/13.4.1.html"><strong aria-hidden="true">13.4.1.</strong> Introduction to Digital Signature