👉 In the context of digital certificates, a "certifier" is typically an individual or organization that verifies and signs digital certificates issued by a certificate authority (CA). These certificates are used to authenticate the identity of individuals or entities who hold them. The process of signing these certificates involves verifying the authenticity of the user's identity through various means such as fingerprint verification, biometric authentication, or other forms of identification verification. Certifiers play an important role in ensuring that digital certificates are secure and tamper-proof