# Lightweight Portable Security

> Linux distribution

**Wikidata**: [Q766079](https://www.wikidata.org/wiki/Q766079)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Lightweight_Portable_Security)  
**Source**: https://4ort.xyz/entity/lightweight-portable-security

## Summary
Lightweight Portable Security (LPS) is a Linux-based operating system developed by the United States Department of Defense for secure, portable computing. Designed for use on removable media such as USB drives, LPS provides a trusted environment for accessing sensitive systems without installing software on local machines. It was first released in June 2011 and reached end-of-life in April 2021.

## Key Facts
- Developed by: United States Department of Defense  
- First released: June 2011  
- Final version: 3.0.4 (released April 30, 2021)  
- Discontinued: April 30, 2021  
- Also known as: LPS  
- Instance of: Linux distribution  
- Official website: [http://spi.dod.mil/LPS-Public_for_DoD.htm](http://spi.dod.mil/LPS-Public_for_DoD.htm)  
- Previous version: 1.5.7 (released March 20, 2015)

## FAQs
### Q: What is Lightweight Portable Security used for?
A: Lightweight Portable Security (LPS) is designed for secure access to networks and systems from untrusted computers. It runs directly from removable media like USB drives, ensuring no persistent data remains on the host machine after use.

### Q: Who created Lightweight Portable Security?
A: The United States Department of Defense developed LPS to provide personnel with a secure, bootable Linux environment for portable computing needs.

### Q: Is Lightweight Portable Security still supported?
A: No, LPS was officially discontinued on April 30, 2021. Users are advised to transition to alternative secure portable solutions.

## Why It Matters
Lightweight Portable Security played a critical role in enabling secure remote access within high-security environments, particularly in U.S. defense operations. By offering a pre-configured, bootable Linux OS tailored for security-sensitive tasks, LPS allowed users to bypass potentially compromised or monitored local systems. Its portability made it ideal for field operations, temporary setups, and scenarios requiring minimal digital footprint. Though now discontinued, LPS demonstrated how lightweight, purpose-built operating systems could address evolving cybersecurity challenges.

## Notable For
- Built specifically for secure, offline use on removable storage devices  
- Maintained and distributed by the U.S. Department of Defense  
- Reached wide adoption across government and military sectors before discontinuation  
- Featured strong encryption and sandboxed network tools for safe browsing and file handling  
- Was one of the few publicly available secure-boot Linux distributions backed by a national defense agency  

## Body

### Overview
Lightweight Portable Security (LPS) is a specialized Linux distribution intended for running securely from removable media such as USB flash drives or CDs. It was developed under the oversight of the U.S. Department of Defense's Space and Naval Warfare Systems Command (SPAWAR), later part of the Program Executive Office for Command, Control and Communications Tactical (PEO C4T).

### Development and Release History
- Initial public release occurred in **June 2011**.
- Versions were regularly updated through at least **March 20, 2015**, with version **1.5.7** being documented during that period.
- On **April 30, 2021**, the final version (**3.0.4**) was released alongside official announcement of program sunset.
- The project’s termination was confirmed via archived documentation hosted by the Air Force, indicating full decommissioning as of **April 30, 2021**.

### Technical Profile
As a Linux-based OS:
- Runs entirely in memory without writing to disk unless explicitly configured otherwise.
- Includes built-in support for encrypted communications and secure web browsing.
- Ships with minimal desktop applications focused on productivity and secure communication.
- Tailored for air-gapped usage and forensic-safe operation.

### Distribution and Availability
- Available for download from the official site: [spi.dod.mil](http://spi.dod.mil/LPS-Public_for_DoD.htm)
- Packaged primarily for x86 architectures; later versions may have included ARM support.
- Provided both standard and “Deluxe” editions featuring additional toolsets for advanced users.

### Legacy and Impact
Though no longer maintained, LPS influenced the development of other portable security-focused operating systems. Its design principles continue to inform best practices around secure mobile computing and ephemeral OS deployment strategies in classified and non-classified settings alike.

## References

1. [Source](https://web.archive.org/web/20210719053055/https://spi.dod.mil/CHANGES.html)
2. [Source](https://web.archive.org/web/20210818100531/https://www.tens.af.mil/download.htm)