The Tauri updater always checks a signature on each update, and that check cannot be turned off. You embed a public key in the app and sign releases with the private key. If the private key leaks, attackers can ship updates. If you lose it, you cannot update existing installs.
How it works
Per the Tauri updater docs, you generate a key pair with the signer command. The public key goes in tauri.conf.json under pubkey, as the key content and not a file path. Each updater artifact gets a matching signature file. In the update metadata, the signature field holds that file's text.
The app downloads the artifact and verifies it against the embedded public key before installing. The docs do not describe the algorithm or verification steps further, so avoid claiming specifics in customer answers.
Transport
The docs say TLS is enforced in production mode. A setting exists that permits non HTTPS endpoints, and the docs say to use it with caution. Do not ship with it. Updates are also blocked from going to an older version by default, unless you provide a custom version comparator.
Key risks
Two failure modes matter.
- Loss. The docs warn that losing the private key means you cannot publish updates to existing installs. Back it up in a secrets manager with access controls.
- Theft. Anyone who holds the key and can host a metadata endpoint your app trusts can distribute code. Treat it like a production signing credential.
The public key can be set at runtime through the plugin or builder, and the docs suggest this for key rotation. Plan a rotation path before you need one, because a leak with no rotation route means a new installer for everyone.
CI handling
Build time signing reads environment variables for the key and optional password. The docs warn that .env files do not work for this. Use your CI platform's secret store, restrict which jobs and branches can read it, and avoid printing it to logs.
Release hygiene
- Limit who can trigger a release build.
- Require review on changes to the build pipeline and the updater configuration.
- Keep the endpoint list short, and own every endpoint.
- Test an update on a clean machine, including a deliberately tampered artifact, which should be refused.
Quick check
Does the signature replace operating system code signing?
No. They solve different problems. The updater signature protects the update channel. OS signing affects how Windows and macOS treat the installed app.
Sources
Last reviewed: 19 October 2026.
