Want to run Tor on simple hardware without leaving a trace? Tor-ramdisk is a simple software package which allows you to do it. Put it on a CD or USB-stick, boot it and now you’re running Tor in a rather secure way.
Official release story as leaked on the Tor mailing list:
I want to announce to the list that a new release of tor-ramdisk is out. Tor-ramdisk is an i686, x86_64 or MIPS uClibc-based micro Linux distribution whose only purpose is to host a Tor server in an environment that maximizes security and privacy. Security is enhanced by hardening the kernel and binaries, and privacy is enhanced by forcing logging to be off at all levels so that even the Tor operator only has access to minimal information. Finally, since everything runs in ephemeral memory, no information survives a reboot, except for the Tor configuration file and the private RSA key, which may be exported/imported by FTP or SCP.
Tor was updated to 0.2.2.37, BusyBox to 1.20.1 and the kernel to 3.4.2 plus Gentoo’s hardened-patches-3.4.2-2.extras. The MIPS port also incorporated these changes, but for this architecture the kernel was kept at vanilla 3.2.5.