The only thing I can think of that might be considered tamper-proof. is a memory cell (SD-RAM or alike) with a "reset when line break" lock (triggered by resistance change and line break) that is contained in a liquid like phosphor, which is contained in a liquid oxidizer (a.k.a. instant flash when opened. with thermal reaction preventing "cold save" of the memory data). the point is why would you want something that is "tamper-proof"... better not store the data at all if your that concerned with ppl tampering with your system.

The only thing I can think of that might be considered tamper-proof is a memory cell (SD-RAM or alike) with a "reset when line break" lock (triggered by resistance change and line break) that is contained in a liquid like phosphor, which is contained in a liquid oxidizer (a.k.a. instant flash when opened with thermal reaction preventing "cold save" of the memory data). The point is why would you want something that is "tamper-proof"... better not store the data at all if you're that concerned with people tampering with your system.