Can you make a TPM (or any piece of hardware) Completely tamper-proof? The “regular” tamper resistant hardware has various physical attacks http://www.milinda-perera.com/pdf/EKKLP12a.pdf
I have been told that conducting-, air-tight-, pressurised- and gas containing metal boxes with sensor triggered explosives(or any other TPM killing function) could counter all known attacks. However I have not been able to find such proofs(article or experiment).
Edit - It might be named "Tamper respondant hardware", however I can only seem to find patterns for this search term.