You can't trust it. One of the first real lessons security work teaches you is that nothing can ever be perfectly secure, it's all about achieving a level of se

You can't trust it. One of the first real lessons security work teaches you is that nothing can ever be perfectly secure, it's all about achieving a level of security that is appropriate given your threat model, and gives you enough confidence to be able to sleep at night. There's steps you can take that involve incredibly secure procurement processes of air gapped devices, but even that will not prove absolute security.