yubicrypt
Developer
Stefan Claas
About
An easy to use public key encryption program for your YubiKey.
Supported YubiKey algorithms:
For encryption with slot 9d:
RSA: 2048, 3072, 4096 bits
For signing with slot 9c:
ECC: P-256, P-384, Ed25519
Simply use Yubico Authenticator to create your signing and encryption certificate and export your encryption certificate, to give it to your friends. You don't have to export your signing certificate, because it is not needed for signature verification.

Installation
You can install this directly from the source code using the Fyne command as follows:
go install fyne.io/tools/cmd/fyne@latest
fyne install github.com/Ch1ffr3punk/yubicrypt@latest
Or you can download the code directly from git:
git clone https://github.com/Ch1ffr3punk/yubicrypt