Certificate validation is the process of verifying that a digital certificate, such as one used to sign software updates or installers, is authentic and issued by a trusted certificate authority (CA). This process ensures that the software has not been tampered with and that it genuinely originates from the claimed developer. During validation, the certificate’s chain of trust is checked, its expiration and revocation status are confirmed, and cryptographic signatures are verified. Certificate validation is a critical cybersecurity measure to prevent the installation of malicious or unauthorized software, protecting users and systems from potential threats.