DigiCert Secure Email (S/MIME) Certificates provide end-to-end email encryption and digital signing for individuals and organizations. The product uses the S/MIME (Secure/Multipurpose Internet Mail Extensions) standard to protect email communications from phishing, tampering, and man-in-the-middle attacks. Each certificate issues a public/private key pair. The private key signs outgoing messages and decrypts incoming ones, while the public key allows recipients to verify message authenticity and send encrypted replies that only the certificate holder can read. Plans are available at three assurance levels: - Individual: For personal accounts or small businesses using shared email platforms. - Business Group: For corporate or shared email addresses (e.g., info@example.com). - Business Employee: For individual employee email addresses within an organization. Certificates are managed through DigiCert's CertCentral platform, which supports automated certificate request and delivery. The product meets CA/Browser Forum standards, is IETF compliant, and supports mailbox-validated, individual-validated, organization-validated, and sponsor-validated signatures. Use cases include meeting regulatory compliance requirements (e.g., PCI DSS, HIPAA), protecting sensitive data in transit, preventing email spoofing and phishing, and improving trust in email communications across industries such as healthcare, insurance, retail, and defense.