# FiloSottile/whoami.filippo.io

A ssh server that knows who you are. $ ssh whoami.filippo.io

Repository: https://github.com/FiloSottile/whoami.filippo.io
Canonical: https://ross.abutalabs.com/products/whoamifilippoio
Language: Go
License: ISC
License Family: permissive
Last push: 2026-04-16T15:13:22+00:00

## Health v2 (maintenance only)
Score: 67/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 77, release rhythm 35, longevity 100
- inputs: {"age_days": 4048, "days_push": 139, "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 2361, forks 113 (observed 2026-08-28T04:06:40.927261+00:00)

## What it is
A public SSH server (written in Go) that identifies visitors by enumerating the public keys their SSH client offers and matching them against a dataset of GitHub users' public keys. It demonstrates a privacy side-channel in SSH public key authentication and shows how to mitigate it.

## Use cases
- demonstrate how ssh leaks public keys to servers
- find which github account my ssh key belongs to
- learn about ssh publickey authentication behavior
- show a demo of key enumeration privacy risk
- configure ssh to stop offering keys to every host

## When to choose
- you want a hands-on demo of SSH public key enumeration
- you're teaching or writing about SSH privacy leaks
- you want to check which GitHub identity your SSH client exposes

## When to avoid
- you need a production SSH server for real authentication
- you want to harden your own infrastructure rather than demo a leak
- you need a general-purpose identity verification service

## Facets
- artifact type: service
- maturity: stable
- function: ssh, security, privacy
- domain: security, privacy, developer-tools
- platform: windows, cross-platform
- tags: ssh-server, public-key-enumeration, github-api, demonstration, go, linux, macos

## Member repositories
- FiloSottile/whoami.filippo.io (main) score 67

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:40.927261+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 2026-08-30T02:36:05.702219+00:00, confidence not recorded.
  - readme: https://github.com/FiloSottile/whoami.filippo.io (fetched 2026-08-28T04:06:40.927261+00:00, sha 14ff109eb271)
- Data as of 2026-08-30T08:39:29.467469+00:00.