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The License Plate Nonce (LPN) is an encrypted and signed file that uniquely identifies your device or Standard System implementation. It is the foundational proof of identity that ties your hardware to a valid license, and Standard checks it regularly to confirm your installation remains authorized.

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What the LPN Contains

The LPN bundles two critical pieces of information:
  • Device ID (Serial Number) — the unique identifier assigned to your hardware or implementation.
  • Product Key — the license key you entered during setup if using the Public Relay or the system generated one for custom use.
In addition to the LPN itself, an additional fingerprint file is generated and obtained during activation. Both files must be present on the device at all times. Standard verifies the fingerprint file every 60 days — if it is missing or invalid, the Standard System will not function.
Do not delete or move the LPN or fingerprint files from your device. If these files are lost, you will need to re-activate your license.

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How the LPN Is Created

The LPN is generated automatically during installation when you provide your license key and Device Serial Number. You do not need to create or manage it manually — the installer handles the full activation flow and places both the LPN and fingerprint files in the correct locations on your device.