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The standard Unix user permissions are enough here. You can create a specific user and change the access permission to the device file to be 0600 and have the device file owned by that specific user. If the /dev folder is recreated at boot time, you will have to use a startup script to reset that ownership and permission after each and every boot. Make sure ...


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Another option could be setting up TLS client certificates. It requires you to create your own certificate authority (CA) and issue client certificates to your end-users. Ideally, you should issue separate certificates for each client device, but it is possible to use just a single shared certificate (with a security tradeoff). Then, on your server you just ...


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