Keyfactor Signum

Keyfactor Signum (formerly SignServer) is an enterprise-grade code signing and digital artifact protection platform engineered to safeguard the software supply chain by securing private signing keys and automating signing operations across development pipelines. Attackers increasingly target the software build lifecycle to inject malicious code into trusted software updates, firmware packages, and container images, turning software vendors into unwitting malware distributors. Keyfactor Signum prevents code tampering and supply chain attacks by centralizing and securing private cryptographic signing keys inside certified hardware security modules (HSMs) or secure cloud enclaves, ensuring that private keys are never exposed on developer workstations or build build servers. The platform integrates seamlessly with continuous integration and continuous deployment (CI/CD) pipelines, enabling automated, high-speed signing of software binaries, mobile applications, container images, Microsoft Authenticode files, and IoT firmware. Development teams can trigger signing operations using developer-friendly command-line tools and native plugins while security administrators enforce strict role-based access controls, multi-person authorization approvals, and complete audit logging. By delivering centralized cryptographic signing policies without sacrificing developer velocity, Keyfactor Signum ensures software artifact authenticity, guarantees tamper-proof code delivery, and meets rigorous supply chain security standards like NIST SP 800-218.