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X.509-SVID

Identity Types
An X.509-SVID is the certificate form of a SPIFFE Verifiable Identity Document, structured as a standard X.509 certificate with the workload’s SPIFFE ID embedded in the Subject Alternative Name (SAN) field. It enables mutual TLS (mTLS) between workloads, where both sides of a connection present and validate X.509-SVIDs to establish cryptographically verified, bidirectional identity. X.509-SVIDs are the most common SVID format used for long-lived service-to-service connections in SPIFFE environments.

X.509

Identity Types
X.509 is a standard defining the format of public key certificates. These certificates are used in cryptographic systems (like SSL/TLS) to securely verify identities through a trusted certificate authority (CA), commonly used in IAM for machine and workload identity verification.

X.509 Certificate

Identity Types
An X.509 certificate is a digital certificate that uses the X.509 standard to authenticate the identity of machines, applications, or users. It contains a public key, identity information, and is signed by a trusted certificate authority (CA), making it critical for secure communication in networks.