Terraform v1.10 introduces ephemeral resources, which are temporary entities that don't persist in state/plan files and exist only during execution, making them ideal for handling sensitive data like secrets, dynamic tokens, or any data that shouldn't be stored. Ephemeral resources can be used to securely manage secrets, reduce security risks, optimize cloud costs, and enhance flexibility in infrastructure-as-code practices. Currently supported by a few providers including Infisical, AWS, Azure, GCP, and Kubernetes. The feature is particularly powerful for GitOps workflows, where it replaces static secrets with ephemeral references, aligning perfectly with the approach used in DevOps environments. To use ephemeral resources, users must limit their references to allowed contexts, combine them with OIDC authentication, and monitor lifecycles to avoid lingering access.