# open-keychain/open-keychain

OpenKeychain is an OpenPGP implementation for Android.

Repository: https://github.com/open-keychain/open-keychain
Canonical: https://ross.abutalabs.com/products/open-keychain
Homepage: https://www.openkeychain.org
Language: Java
License: GPL-3.0
License Family: copyleft
Topics: android, openpgp
Last push: 2024-05-16T07:37:24+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 5290, "days_push": 839, "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 2612, forks 535 (observed 2026-08-28T04:07:04.461195+00:00)

## What it is
OpenKeychain is an open-source OpenPGP implementation for Android that manages encryption keys and encrypts, decrypts, and signs messages and files. It integrates with apps like K-9 Mail, Conversations, and Password Store to provide end-to-end encryption.

## Use cases
- encrypt and decrypt emails on android
- manage openpgp keys on my phone
- sign and verify messages with pgp
- use pass password store with pgp on android
- exchange pgp keys with contacts
- add end-to-end encryption to k-9 mail

## When to choose
- you need OpenPGP encryption or key management on Android
- you use apps like K-9 Mail, Conversations, or Password Store that integrate with it
- you want an audited, free-software OpenPGP solution on mobile

## When to avoid
- you need actively developed software with new features - the project is no longer actively developed
- you need OpenPGP on desktop or non-Android platforms
- you need a general-purpose encryption tool rather than OpenPGP

## Facets
- artifact type: application
- maturity: maintenance
- function: cryptography, security
- domain: security, privacy, android-tools
- platform: -
- tags: openpgp, pgp, key-management, e2e-encryption, email-encryption, gpg, android

## Member repositories
- open-keychain/open-keychain (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:04.461195+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 2026-08-30T02:20:38.934333+00:00, confidence not recorded.
  - readme: https://github.com/open-keychain/open-keychain (fetched 2026-08-28T04:07:04.461195+00:00, sha 55d77b9d54e6)
  - homepage: https://www.openkeychain.org (fetched 2026-08-29T10:03:33.250045+00:00, sha 35bf4d713974)
  - site_page: https://www.openkeychain.org/about/impressum (fetched 2026-08-29T10:03:33.261512+00:00, sha aafb97931fbf)
  - site_page: https://www.openkeychain.org/faq (fetched 2026-08-29T10:03:33.259378+00:00, sha be6fcf1a65d0)
- Data as of 2026-08-30T08:39:29.467469+00:00.