Uncomplicatedly simple: if you manage your long, complicated and secure passwords in a password manager app (like KeePassDroid) on your Android device, you can now "type" them easily on any other device, be it a phone, tablet, or PC running Windows, Linux, or macOS.

sub rosa allows you to program the static password of your YubiKey which then can be used to "type" the password with the touch of a finger.

Once you are done "typing" your long, complicated and secure password, remember to wipe clean your YubiKey... Is not much security if anyone can "type" your password by touching the YubiKey!

The various keyboards accept the following characters:

• US: space, \n, \t and abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!"#$%&'`()*+-=,./:;<>?@[]^_{}|~
• UK: space, \n, \t and abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@£$%&'`()*+-=,./:;<>?"[#]^_{}~¬
• DE: space, \n, \t and abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!"#$%&'()*+-=,./:;<>?^_`§´ÄÖÜßäöü
• FR: space, \n, \t and abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!"$%&'()*+-=,./:;<_£§°²µàçèéù
• IT: space, \n, \t and abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!"#$%&'()*+,-./:;<=>?@\^_`|£§°çèéàìòù
• MODHEX: bcdefghijklnrtuvBCDEFGHIJKLNRTUV

Since version 2.0.0, sub rosa has added support for OpenPGP. You can now provision an OpenPGP key onto your YubiKey, Nitrokey 3, Nitrokey Pro and Librem Key.

In keeping with the app’s motto, “Uncomplicatedly simple,” you can encrypt, decrypt, sign, and authenticate with your security key, then wipe it clean and write another OpenPGP key to change your digital identity.

SSH authentication is simpler now—you no longer need to reuse the same SSH key or buy multiple security keys

sub rosa is an Android app, built on top of YubiKit library provided by Yubico,

Version 2.3.0 - removed from F-Droid. sub rosa is now available only through IzzyOnDroid repo. or github - Code clean up - Added support for Librem Key and Nitrokey 2 Pro