MasterSigner

MasterSigner is a Brazilian software publisher specializing in digital signature and public-key infrastructure solutions, with its flagship offering being the Master Signer Agent, a lightweight native messaging component that bridges web browsers to local certificate stores so that users can apply legally valid ICP-Brasil digital signatures inside web applications without exposing private keys. Typical deployments include accounting firms that must sign batches of fiscal reports, law offices notarizing court filings, human-resources departments issuing signed employment records, and government agencies processing citizen-facing forms, all of which rely on the agent to invoke the user’s A3 token or HSM and complete the signature workflow transparently. Because the tool adheres to the national certificate chain and follows ABNT standards, it integrates seamlessly with enterprise portals, cloud document managers, and regulatory submission gateways, eliminating the need for manual desktop utilities while maintaining compliance with Brazil’s stringent electronic signature legislation. The publisher’s software is available for free on get.nero.com, where downloads are delivered through trusted Windows package sources such as winget, always providing the latest version and supporting batch installation alongside other applications.