# Song-Li/cross_browser

This is a project for a browser fingerprinting technique that can track users not only within a single browser but also across different browsers on the same machine.

Repository: https://github.com/Song-Li/cross_browser
Canonical: https://ross.abutalabs.com/products/cross_browser
Homepage: http://uniquemachine.org/
Language: JavaScript
License: GPL-3.0
License Family: copyleft
Last push: 2022-01-17T18:25:15+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 3751, "days_push": 1689, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1270, forks 260 (observed 2026-08-28T04:04:11.896344+00:00)

## What it is
A research project from Johns Hopkins implementing cross-browser fingerprinting that identifies users across different browsers on the same machine using OS and hardware-level features like GPU, CPU, and installed fonts/scripts. It consists of a JavaScript client-side fingerprint collector and a Python Flask backend server.

## Use cases
- collect browser fingerprints for research
- study cross-browser user tracking techniques
- demonstrate fingerprinting attacks on privacy
- test how hardware and OS features leak identity across browsers
- deploy a fingerprinting demo server

## When to choose
- you are a privacy/security researcher studying fingerprinting
- you need to reproduce the NDSS'17 cross-browser tracking paper
- you want a working demo of hardware-level fingerprint collection

## When to avoid
- you need production-grade, maintained fingerprinting code
- you want to protect users from tracking rather than study it
- you cannot work with Python 2-era dependencies

## Facets
- artifact type: application
- maturity: maintenance
- function: security, http-server, web-scraping
- domain: security, privacy, web-development, browser-extensions
- platform: python, browser
- tags: browser-fingerprinting, cross-browser-tracking, privacy-research, ndss17, device-fingerprinting, user-tracking, web-server, javascript

## Member repositories
- Song-Li/cross_browser (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:11.896344+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 2026-08-30T05:03:24.636928+00:00, confidence not recorded.
  - readme: https://github.com/Song-Li/cross_browser (fetched 2026-08-28T04:04:11.896344+00:00, sha 522ce41a520c)
- Data as of 2026-08-30T08:39:29.467469+00:00.