Lightweight Portable Security (LPS) creates a secure end node from trusted media on almost any Intel-based computer (PC or Mac). LPS boots a thin Linux operating system from a CD or USB flash stick without mounting a local hard drive. Administrator privileges are not required; nothing is installed. The ATSPI Technology Office created the LPS family to address particular use cases. LPS-Public is a safer, general-purpose solution for using web-based applications. The accredited LPS-Remote Access is only for accessing your organization's private network.

LPS Release Notes
Changes in Version 1.2.4
Maintenance release, released 19 September 2011

 Added more support for RealTek wireless drivers
 Added additional broadband cellular drivers
 Added additional SmartCard drivers
 Revised About Box to show licensing info
 Removed Gmail S/MIME addon, which no longer works with Gmail
 Updated Flash to 10.3.183.7
 Updated Firefox to 3.6.22
 Updated DOD Configuration add-on to 1.3.3
 Updated Java to 1.6u27
 Updated OpenSSH to 5.9p1
 Updated DOD Root CAs 
http://spi.dod.mil/CHANGES.html
 
http://spi.dod.mil/lipose.htm 
http://spi.dod.mil/docs/Hashes.pdf