SPIFFE is a universal identity control plane for distributed systems. 

SPIFFE allows Accuknox to generate identities to secure containerized workloads and extend the notion of identity to edge networks and other non-k8s entities.

Secure Production Identity Framework For Everyone, provides a secure identity, in the form of a X.509 certificate.

SPIRE is an open-source toolchain that implements the SPIFFE specification for use in Kubernetes and other environments.