Wednesday, 22 July 2026

mTLS - building machine to machine trust

What is mTLS? 

mTLS is also known as mutual TLS, after the ubiquitous security protocol. It is used in environments where machine-to-machine trust really matters.

Where in general is mTLS used? Where specifically is mTLS used? Did someone say "Kubernetes service mesh"? I think so! 

It's not generally used for public websites, but inside serious enterprise systems, it's a standard way to guarantee only authenticated services speak to each other.

Examples in modern infrastructure include: Kubernetes service meshes (Istio, Linkerd), API gateways, internal microservices, banking and trading and zero-trust networks.

Is mTLS a standard?

It's a section in TLS standard.

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