Mutual TLS (mTLS) for Service-to-Service Auth
Secure gRPC service-to-service calls with mutual TLS, where both client and server present certificates to cryptographically prove their identity.
Beyond One-Way TLS
Standard TLS authenticates only the server to the client. In a zero-trust network, the server also needs to verify who is calling.
Mutual TLS (mTLS) makes both sides present certificates.
How mTLS Works
During the handshake:
- The server sends its certificate (as in normal TLS)
- The server then requests the client's certificate
- The client presents its cert and proves it holds the private key
- Each side validates the other against a trusted CA
All lessons in this course
- TLS/SSL for gRPC
- Authentication and Authorization
- Interceptors for Security
- Mutual TLS (mTLS) for Service-to-Service Auth