PKI provides a flexible and scalable identity-first security solution that aligns with zero trust and secures a wide variety of enterprise use cases. PKI uses digital certificates and associated cryptographic keys to establish identities for resources on networks and authenticate them for secure access, creating a trusted network environment and protecting data in transit. The technology is used to securely enable modern infrastructure and applications, including HTTPS secure web browser connections, SSH keys, and code signing, which protects executable files from tampering. PKI also helps organizations reduce the risk of unauthorized access by leveraging private certificate authorities, increasing efficiency, and reducing time to market. Furthermore, PKI plays a critical role in HashiCorp Vault's zero trust security architecture, automating and unifying certificate management with a single control plane.