# kryptco/kr

DEPRECATED A dev tool for SSH auth + Git commit/tag signing using a key stored in Krypton.

Repository: https://github.com/kryptco/kr
Canonical: https://ross.abutalabs.com/products/kr
Homepage: https://krypt.co/developers/
Language: Go
License: NOASSERTION
License Family: other
Archived: true
Last push: 2023-11-07T16:09:05+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 3552, "days_push": 1030, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: archived, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1570, forks 109 (observed 2026-08-28T04:05:05.355800+00:00)

## What it is
A deprecated Go CLI tool that runs an SSH agent (krd) routing private key operations to a paired Krypton mobile app, so SSH authentication and Git commit/tag signing are approved on the phone while the key never leaves it. Development has moved to Akamai's akr repository.

## Use cases
- authenticate SSH logins with a key stored on my phone
- sign git commits with a key on my mobile device
- require phone approval for SSH key usage
- keep SSH private keys off my laptop
- two-factor approve git tag signing
- phishing-resistant ssh agent with mobile tap-to-approve

## When to choose
- you already use the Krypton mobile app and its paired workflow
- you want phone-based approval for SSH and Git signing on macOS or Linux

## When to avoid
- starting a new project - the repo is deprecated and unmaintained
- you need an actively maintained tool - use the successor at akamai/akr or standard ssh-agent alternatives
- you need Windows support

## Facets
- artifact type: cli-tool
- maturity: abandoned
- function: auth, cryptography, ssh, developer-tools
- domain: security, developer-tools, version-control
- platform: cli
- tags: ssh-agent, git-signing, mobile-approval, deprecated, two-factor, hardware-key, macos, linux, ios, android

## Member repositories
- kryptco/kr (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:05.355800+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 2026-08-30T03:58:34.255459+00:00, confidence not recorded.
  - readme: https://github.com/kryptco/kr (fetched 2026-08-28T04:05:05.355800+00:00, sha 57ba787db25e)
  - homepage: https://krypt.co/developers/ (fetched 2026-08-29T11:28:27.724291+00:00, sha eebc26f4acf0)
  - site_page: https://krypt.co/docs/security/privacy-policy.html (fetched 2026-08-29T11:28:27.735221+00:00, sha eebc26f4acf0)
  - site_page: https://krypt.co/docs (fetched 2026-08-29T11:28:27.737027+00:00, sha eebc26f4acf0)
  - site_page: https://krypt.co/about (fetched 2026-08-29T11:28:27.738625+00:00, sha eebc26f4acf0)
  - site_page: https://krypt.co/faq (fetched 2026-08-29T11:28:27.727356+00:00, sha eebc26f4acf0)
  - site_page: https://krypt.co/krext (fetched 2026-08-29T11:28:27.729241+00:00, sha eebc26f4acf0)
  - site_page: https://krypt.co/blog/posts/krypton-our-zero-trust-infrastructure.html (fetched 2026-08-29T11:28:27.731356+00:00, sha eebc26f4acf0)
- Data as of 2026-08-30T08:39:29.467469+00:00.