# UMSKT/UMSKT

An open source toolkit designed to research Microsoft Pre-Vista licensing mechanisms

Repository: https://github.com/UMSKT/UMSKT
Canonical: https://ross.abutalabs.com/products/umskt
Language: C++
License: AGPL-3.0
License Family: copyleft
Last push: 2026-06-27T16:50:08+00:00

## Health v2 (maintenance only)
Score: 78/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 89, release rhythm 60, longevity 85
- inputs: {"age_days": 1198, "days_push": 67, "days_rel": 117, "gap_med": 10, "n_releases_24m": 6}
- flags: prerelease_only
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2318, forks 243 (observed 2026-08-28T04:06:36.977416+00:00)

## What it is
UMSKT (Universal MS Key Toolkit) is an open-source C++ CLI toolkit for researching and experimenting with Microsoft's pre-Vista (pre-2012) product licensing and key generation mechanisms. It runs on Windows, macOS, Linux, and even MS-DOS, and is intended for studying retro Microsoft activation algorithms.

## Use cases
- research how Windows XP product key validation works
- generate and study pre-Vista Microsoft licensing keys
- experiment with retro Microsoft activation algorithms
- study the crypto algorithms behind old Microsoft product IDs
- run a key research tool on MS-DOS or legacy Windows

## When to choose
- you are researching or documenting legacy Microsoft licensing schemes
- you need a cross-platform (including DOS) tool for pre-2012 Microsoft key experiments
- you want an open-source, actively maintained alternative to XPKeygen-style tools

## When to avoid
- you need to activate or license modern Windows Vista or later products
- you want a GUI tool rather than a command-line utility
- you need a legally sanctioned licensing solution for production systems

## Facets
- artifact type: cli-tool
- maturity: active
- function: cryptography, security, reverse-engineering, cli
- domain: security, reverse-engineering, developer-tools, windows
- platform: windows, cli, cpp, cross-platform
- tags: product-key, windows-xp, licensing, retro-computing, ms-dos, activation, research-tool, linux, macos

## Member repositories
- UMSKT/UMSKT (main) score 78

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:36.977416+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T02:38:52.706383+00:00, confidence not recorded.
  - readme: https://github.com/UMSKT/UMSKT (fetched 2026-08-28T04:06:36.977416+00:00, sha 5da2611dc319)
- Data as of 2026-08-30T08:39:29.467469+00:00.