Fixing Certificate Errors When Browsing
How to Fix It?
• For Users:
o Ensure system date/time is correct.
o Update your browser.
o Switch to a different network.
o Clear browser cache.
o Check security software settings.
• For Website Owners:
o Renew expired certificates.
o Use a trusted Certificate Authority (CA).
o Fix domain mismatches.
o Provide the full certificate chain.
Why It Happens:
• Expired or Revoked Certificates – Certificates have expiration dates or may be revoked for security reasons.
• Incorrect Date/Time – SSL/TLS validation depends on accurate system time.
• Untrusted or Self-Signed Certificates – Browsers flag certificates not issued by a trusted CA.
• Domain Mismatch – The certificate must match the website URL.
• Incomplete Certificate Chain – Some sites fail to provide intermediate certificates.
• Network Interference – Firewalls, proxies, or public Wi-Fi can disrupt SSL connections.
• Outdated Browsers – Older browsers may not recognize modern encryption standards.
• Security Risks & Man-in-the-Middle Attacks – Certificate errors can indicate a compromised website or an attacker intercepting your connection. Cybercriminals can use fraudulent certificates to steal sensitive data, such as login credentials and financial information. Avoid proceeding if a site has certificate errors, especially when entering personal information.
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