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ID: org.sufficientlysecure.keychain

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The description of OpenKeychain: Easy PGP

OpenKeychain helps you communicate more privately and securely. It uses encryption to ensure that your messages can be read only by the people you send them to, others can send you messages that only you can read, and these messages can be digitally signed so the people getting them are sure who sent them. OpenKeychain is based on the well established OpenPGP standard making encryption compatible across your devices and systems. For a list of compatible software for Windows, Mac OS, and other operating systems consult

Modern encryption is based on digital “keys”. OpenKeychain stores and manages your keys, and those of the people you communicate with, on your Android smartphone. It also helps you find others’ keys online, and exchange keys. But its most frequent use is in using those keys to encrypt and decrypt messages.

★ Integration with other Apps:
• K-9 Mail
• Conversations
• and many more…

★ Open Source: OpenKeychain is designed to be trustworthy. It’s Free Software with no secrets; anyone can examine and validate every bit of it (Source code available at

★ Independent Security Audit: The auditing company Cure53 performed an intensive security audit of OpenKeychain. The security experts summarize their final result with \"[...] none of the spotted issues were considered to be of a critical severity in terms of security implications. The latter is a significant and impressive result for an app of this complexity and relevance.\"

★ Permissions: Because OpenKeychain is Free Software, anyone can validate that the permissions are indeed only required for the listed features.
• In-app purchases: Donate to the developers
• Identity: Pre-fill name and email addresses
• Contacts: Connect keys to your contacts (only offline)
• Photos/Media/Files: Import/export keys from SD card
• Camera: Scan QR Codes to add other people's keys
• Others: Internet permission to retrieve keys, NFC permission to use YubiKeys

Starting with Android 6, permissions are requested when required in-app!
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OpenKeychain: Easy PGP 5.7.5 APK for Android 4.0.3+

Version 5.7.5 for Android 4.0.3+
Update on 2021-04-30
Installs 500.000++
File size 10.089.705 bytes
Permissions view permissions
What's new 5.7
* Fixes for Curve25519
* IDEA cipher is now considered insecure
* Compatibility with Android 10 and higher
* Several bug fixes
* Fix decryption from clipboard on Android 10
* Add WKD Advanced method
* Add COTECH Security Key Shop
* Use as default keyserver
* Improved key import from clipboard
* Support for Ledger Nano S
* Support Web Key Directory (WKD) search
* Fixed potential API security issue


  • To use OpenPGP encryption with support for PGP/MIME on an Android device, you will require additional apps from the Google Play Store. ... Before you begin: PGP KeyRing also exists as a free test version. In the test version, you can only use one private and two public keys.
  • The app secures your messages with end-to-end encryption. ... OpenKeychain is an open source app that implements the OpenPGP encryption standard on Android devices. OpenPGP is the open source implementation of the PGP encryption standard. You'll find it in hundreds, if not thousands, of different applications.
  • Installing OpenKeychain
    • Open the Google Play Store on your Android device.
    • Search for openkeychain.
    • Locate and tap the entry by Sufficiently Secure.
    • Tap Install.
    • Read the permissions listings.
    • If the permissions listings are acceptable, tap Accept.
    • Allow the installation to finish.
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