Tin Hat is a Linux distribution derived from hardened Gentoo which aims to provide a very secure, stable and fast Desktop environment that lives purely in RAM................
Tin Hat requires about 4 GB to run comfortably, 3 GB for the tmpfs root file system, and 1 GB for paging. If one wants to further reintroduce Gentoo's portage system and/or the kernel source tree, 4GB becomes a very tight squeeze.
For more information, go to Tin Hat
