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When creating electronic devices there are times that we want to make it difficult for an unauthorized person to open the device.

I was wondering where there might be a list of methods or common techniques used to accomplish this.

What comes to mind are the following:

  • Hiding screws behind stickers
  • Special screws (non-standard heads)
  • Cover contains contact that closes circuit so when disconnected/open circuit does not power on

What are some other (or more sophisticated) methods available?

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3 Answers 3

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A few off the top of my head:

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Fasteners with left hand threads, plus a couple of dummy fasteners with right hand threads.

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From experience, triangular-headed screws are very hard to remove without the correct tool - especially if surrounded by an annular shield.

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