SPIRE Runtime
What is SPIRE Runtime?
SPIRE RuntimeThe reference open-source implementation of SPIFFE: a server-and-agent system that attests workloads and issues short-lived X.509 or JWT SVIDs.
SPIRE (SPIFFE Runtime Environment) is the production-grade reference implementation of SPIFFE. It consists of a central SPIRE Server that maintains registration entries and a signing CA, and a SPIRE Agent that runs on each node, performs node and workload attestation, and exposes the SPIFFE Workload API over a local UNIX socket. Attestation plugins prove a workload's properties — Kubernetes service account, container image hash, instance metadata on AWS/GCP/Azure, bare-metal TPM measurements — before the agent fetches a short-lived SVID for that workload. SPIRE supports federation between trust domains and integrates with Istio, Kuma, Envoy, Vault, and AWS/Azure/GCP. It removes long-lived secrets in favor of cryptographic, attested identity.
● Examples
- 01
SPIRE Agent on a Kubernetes node attests pods via Kubernetes PSAT plugin and serves SVIDs.
- 02
Federating two SPIRE trust domains across business units so services can verify each other's SVIDs.
● Frequently asked questions
What is SPIRE Runtime?
The reference open-source implementation of SPIFFE: a server-and-agent system that attests workloads and issues short-lived X.509 or JWT SVIDs. It belongs to the Cloud Security category of cybersecurity.
What does SPIRE Runtime mean?
The reference open-source implementation of SPIFFE: a server-and-agent system that attests workloads and issues short-lived X.509 or JWT SVIDs.
How does SPIRE Runtime work?
SPIRE (SPIFFE Runtime Environment) is the production-grade reference implementation of SPIFFE. It consists of a central SPIRE Server that maintains registration entries and a signing CA, and a SPIRE Agent that runs on each node, performs node and workload attestation, and exposes the SPIFFE Workload API over a local UNIX socket. Attestation plugins prove a workload's properties — Kubernetes service account, container image hash, instance metadata on AWS/GCP/Azure, bare-metal TPM measurements — before the agent fetches a short-lived SVID for that workload. SPIRE supports federation between trust domains and integrates with Istio, Kuma, Envoy, Vault, and AWS/Azure/GCP. It removes long-lived secrets in favor of cryptographic, attested identity.
How do you defend against SPIRE Runtime?
Defences for SPIRE Runtime typically combine technical controls and operational practices, as detailed in the full definition above.
What are other names for SPIRE Runtime?
Common alternative names include: SPIFFE Runtime Environment.
● Related terms
- cloud-security№ 1078
SPIFFE
An open standard for assigning cryptographic, portable identities to software workloads using URI-based SPIFFE IDs and short-lived X.509 or JWT SVIDs.
- cloud-security№ 1248
Workload Identity
A cryptographic identity assigned to a service, container, or function so it can authenticate to other systems without long-lived shared secrets.
- cloud-security№ 1014
Service Mesh Security
The set of identity, encryption, and authorization controls a service mesh provides to secure service-to-service traffic in a cloud-native environment.
- cloud-security№ 559
Istio Security
The security feature set of the Istio service mesh: workload identity via SPIFFE, automatic mutual TLS, and AuthorizationPolicy/RequestAuthentication for fine-grained access control.
- network-security№ 1262
Zero Trust Network
A network architecture that never trusts users, devices, or services by default and enforces continuous, identity-aware verification of every connection.