Assinador Serpro

The tool enables users to apply a digital certificate to sign documents or to verify the authenticity of already‑signed files. It operates on macOS and requires administrative rights for installation, as well as internet access to query certificate‑revocation lists and, optionally, a time‑stamp service. The application integrates with modern browsers such as Firefox and Chrome, and it may need permission to access the local network for full functionality.

Intended users are individuals or organizations that hold a digital certificate issued by a certification authority accredited by ICP‑Brasil and need to perform electronic signing or validation within a secure, online‑connected environment. The software relies on NTP servers for timestamping, with the option to use a paid time‑stamp service from SERPRO when stronger proof of timing is required.

Installation is performed by downloading the macOS package from the provider’s site, after which the user accepts the terms of use. The application is considered stable and is part of a broader suite of public‑service solutions offered by the provider.