Document Signing Certificates

To apply a globally trusted, tamper-proof signature, you cannot rely on a password alone. Instead, DigiCert requires a physical hardware component—either a pre-configured, encrypted USB eToken or an approved Hardware Security Module (HSM)—alongside your secret password. This ensures your private signing key remains completely isolated and protected against remote digital theft.

Seamless cross-platform interoperability, ensuring your signed PDFs and documents are instantly recognized and trusted globally. Because DigiCert is a member of the Adobe Approved Trust List (AATL) and Microsoft Trusted Root Program, signatures automatically validate as safe and authentic when opened in Adobe Acrobat or Microsoft Office. There are no jarring security warnings or error messages, providing a smooth, trustworthy experience for recipients across different operating systems.

Document signing certificates ensure robust legal compliance by transforming standard electronic files into legally binding agreements. By utilising rigorous identity validation, they adhere to the world's most stringent regulatory frameworks, including the U.S. Federal ESIGN Act and Europe's eIDAS regulation.

When you sign a file, DigiCert's cryptographically secure timestamping server (compliant with international RFC 3161 standards) locks in the exact date and time the signature was applied. This creates an unalterable audit trail. Because platforms like Adobe and Microsoft validate the signature against this secure historical timestamp rather than the current date, your documents maintain long-term validation (LTV) and legal enforceability for years to come without needing to be re-signed.