<p><img src="https://images.cointelegraph.com/images/840_aHR0cHM6Ly9zMy5jb2ludGVsZWdyYXBoLmNvbS91cGxvYWRzLzIwMjQtMDYvZTM4OTJjZDQtOGQ4ZC00ZDZlLTlmOTYtMDgwNzllODcyYzI3LmpwZw==.jpg"></p><p>A failed DDoS attack on the Cardano blockchain led developers to initiate a node upgrade to enhance security.</p>