December 22, 2025
Understanding the Differences Between UDP and TCP
Discover the key differences between UDP and TCP in this easy-to-understand guide. Learn when to use each protocol for optimal network performance.
DigiCert Team
Articles by DigiCert Team
December 22, 2025
What Is Port 53?
Discover the purpose of port 53 and why it's essential for your internet connections. This guide will explain everything you need to know about port 53.
December 16, 2025
Why Organizations Should Avoid Self-Signed Certificates
Uncover the potential dangers of using self-signed certificates and why they might be a risky option for your organization’s secure communications.
November 18, 2025
Navigating ICANN’s New GTLD Application Process
Discover practical steps to simplify the gTLD application process and see how partnering with Vercara can streamline technical, compliance, and security requirements for your custom domain.
November 13, 2025
Should You Create Your Own TLD?
Explore the value of custom top-level domains, from SEO and brand credibility to application steps and best practices for launching a secure, trusted TLD.
November 11, 2025
Keep the Grinch Out: Holiday Retail Cyber Threat Risk
DNS security is a frontline defense against cyber threats that target online retailers during the holiday shopping rush.
November 4, 2025
What Is Port 53 and Its DDoS Attack Risk?
Learn how to protect your organization from DNS port 53 DDoS attacks with actionable strategies, including query limits, traffic filtering, and redundant networks. Keep your DNS fast, reliable, and secure under any threat.
November 3, 2025
UltraDDoS Protect DDoS Bot Cluster Analysis
DigiCert’s 2025 DDoS Bot Cluster Analysis reveals how 16M bots operate in synchronized patterns, exposing global threats and defense insights.
November 3, 2025
Zero-Day Vulnerabilities
Zero-day vulnerabilities explained: how attackers exploit unknown flaws—and how to mitigate risk with rapid patching, virtual patching, WAFs, zero-trust, and monitoring.
November 3, 2025
XML API DoS Attacks
XML API DoS attacks exploit XML parsing flaws to crash apps and drain resources. Learn how to prevent Billion Laughs, XXE, and other XML-layer exploits.
November 3, 2025
Worms
Computer worms self-replicate to spread across networks, causing data loss, slowdowns, and breaches. Learn how to detect, prevent, and stop their spread.
October 31, 2025
Trojan Horse Malware
Learn how Trojan horse malware deceives users, steals data, and disrupts businesses. Understand types, real-world examples, and proven prevention strategies.