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+---
+tags:
+  - tailscale
+  - vpn
+references:
+  - https://tailscale.com/blog/tailscale-key-management
+---
+# About keys
+Two types of keys: machine keys and node keys.
+
+The machine key is tied to a specific machine and is used during pre-authorization (started when it first attempts to join a network).
+
+When successfully added to a network a node key is generated on the client. The public component is tied to the machine key on the control server.
+The node key is also tied to an identity; via the URL that's sent back to the client and then used to login.
+
+The public node key is then distributed to other nodes it's allowed to communicate with.
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