Lightweight Portable Security (LPS) is what it implies, a light Linux OS, created by the US Air Force Research Laboratory for their & general public use.

Trusted End Node Security (TENS), previously called Lightweight Portable Security (LPS), is a Linux-based live CD with a goal of allowing users to work on a computer without the risk of exposing their credentials and private data to malware, key loggers and other Internet-era ills. It includes a minimal set of applications and utilities, such as the Firefox web browser or an encryption wizard for encrypting and decrypting personal files. The live CD is a product produced by the United States of America's Department of Defence and is part of that organization's Software Protection Initiative.

A new version is generally released 3-4 times yearly, there a Deluxe (which includes LibreOffice & Adobe Reader) & a Standard one w/out these. There are also PAE & non-PAE releases in both versions. This can be used for general web browsing & making transactions, though a clean boot is recommended before conducting the latter