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   cjd (cjd@pkteerium.xyz)'s status on Sunday, 03-Aug-2025 06:19:38 JST cjd

   in reply to
   Detecting gold content is a total disaster, but what they can do is put a physical one-way function (i.e. glitter paint) on the goldback and make a phone app so you can scan it and see that the serial number matches and the glitter is the same pattern as what they made at the factory, so you can verify provenance.
   
   Picrel: How to send things through the mail and know that they were not opened.
   
   https://dys2p.com/en/2021-12-tamper-evident-protection.html