Digital Certificate Validation Service ensure the validity and authenticity of certificates used in secure communications or transactions. Digital Certificate Validation Services provide mechanisms to confirm the authenticity and validity of a digital certificate in real-time. These services ensure that the certificate has been issued by a trusted Certification Authority (CA) and has not been revoked or expired. Validation services commonly use formats and protocols like ITU-T Recommendation X.509, X.509 Internet PKI Online Certificate Status Protocol (OCSP) or Internet X.509 PKI Certificate and Certificate Revocation List (CRL) Profile for this purpose. Key Features * Real-Time Validation: Verifies certificates through OCSP or CRL checks. * Trust Chain Verification: Ensures the certificate is issued by a trusted CA and complies with the chain of trust. * Revocation Status: Confirms that the certificate is not revoked. * Integration with Applications: Provides APIs or plugins for seamless integration with email, web browsers, or other secure applications.