SSL/TLS Certificate Check

Understanding Your SSL/TLS Certificate Audit

An SSL/TLS certificate is critical for securing communication between a website and its users. It encrypts data, verifies the server's identity, and builds trust. Our SSL/TLS Check service provides a detailed audit of your certificate's properties, helping you identify potential issues that could compromise security or user experience.

Key SSL/TLS Certificate Parameters Explained:

• Subject Common Name (CN)

  This is the primary domain name for which the certificate was issued. It's crucial for browsers to match this with the website's URL to establish a secure connection. A mismatch will result in a security warning.

• Issuer

  The Certificate Authority (CA) that issued your SSL certificate. Trustworthy CAs are essential for browsers to validate your certificate. This parameter confirms the origin and trustworthiness of your certificate.

• Validity Period (Valid From / Valid To / Remaining Days)

  Indicates the start and end dates of the certificate's active period. An expired certificate will break your site's HTTPS connection, leading to security warnings and loss of user trust. Monitoring "Remaining Days" helps prevent unexpected expirations.

• Key Type (e.g., RSA, ECDSA)

  The cryptographic algorithm used for the certificate's public key. RSA is traditionally common, while ECDSA offers equivalent security with smaller, faster keys. The choice impacts performance and security strength.

• Signature Algorithm

  The algorithm used by the CA to sign the certificate. Modern, strong algorithms (like SHA256) are vital for cryptographic integrity. Outdated algorithms can make your certificate vulnerable to attacks.

• Subject Alternative Names (SANs)

  Lists additional domain names (including subdomains or other associated domains) that the certificate secures. It's important that all domain variations your website uses are listed here to avoid certificate warnings.

Regularly checking these parameters ensures your website maintains strong encryption, builds user confidence, and avoids costly security incidents.