Assuming all the other layers are in place and SAFE is going to make the world transparent and finally give us inclusive vice extraction political and economic systems and you’re on the edge about to upload the most important piece of info ever divulged but you can’t just trust any old hardware. A Black Phone for instance wouldn’t cut it because its full of proprietary secret sauce that screams NSA back door. Maybe you find a PC from 1981 that still works and meets your risk level for hardware trojans but then how do you get it to interface with the SAFE mesh without the risk of a hardware trojan in the intervening chips?
Or print the solution from community verified files:
Verified open source code to print a blown up version of an ancient Intel 4004 and wireless antenna other super basic pieces on a fabber. Verified file that can be loaded in to a very high resolution cell phone camera to optically confirm what was printed out was as intended. Verified file to soft proof super simple design from the inside that so that anything that might have been added in the fabbing wasn’t. The simplicity of the design makes it possible to virgin build and then double check with open source verified code.