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Have you ever encountered such a strange thing: just searching for "weight loss recipes" on a certain website, in the blink of an eye, your social media and shopping apps start pushing you various meal replacement products and fitness advertisements? Thinking carefully is extremely frightening, isn't it?

An expired SSL certificate can trigger browser “Not Secure” warnings and break HTTPS-dependent flows. This article outlines practical steps for emergency recovery, renewal/replacement, full-chain verification, and long-term prevention.

Starting from 2026-04-01, newly issued SSL/TLS certificates will have a 200-day validity period. Users who purchased 1-year certificates can automatically download newly issued certificates after expiry to maintain continuous HTTPS coverage.

Some customers see only ~200 days of validity after purchasing a 1-year SSL/TLS certificate. This article explains why shorter lifetimes happen and how to maintain full-year coverage via reissue/renewal best practices.

Major CAs and browser vendors are accelerating TLS 1.3 adoption and Post-Quantum Cryptography (PQC) standards. This article outlines key policy updates, technological trends, and recommendations for enterprises in 2026.

This article provides an in-depth analysis of all aspects of SSL certificate validity periods, including validity periods for different certificate types, importance of validity periods, impact of certificate expiration, management best practices, automated management, special situation handling, etc., helping you make informed choices and establish effective certificate management mechanisms.

This article provides detailed information about CVE-2016-2183 vulnerability principles, impact scope, and comprehensive remediation solutions for Windows Server 2008-2016 Remote Desktop Services, including Group Policy configuration, registry modification, PowerShell script automation, and detailed verification steps and troubleshooting guides.

This article provides an in-depth analysis of historical and current SSL/TLS protocol vulnerabilities, including detailed descriptions, impact scope, and remediation solutions for major vulnerabilities such as POODLE, BEAST, CRIME, FREAK, DROWN, Logjam, Heartbleed, and ROBOT, along with TLS 1.2/1.3 configuration best practices, vulnerability detection methods, and emergency response procedures.

This comprehensive guide covers SSL certificate deployment best practices for 2025, including certificate type selection, brand comparison, application process, server configuration, and security best practices, helping you build a secure and reliable HTTPS website from certificate selection to server configuration.

As a web developer, I tested Safecert's free SSL certificate service. 90-day validity, 256-bit encryption, completely free - perfect for personal websites and small projects.