I store my PKI CA certificate and private key on a Yubikey and used it to issue end user certificates but after upgrading to openssl3 from openssl1 this no longer works. The script that I have used...

I'm following the FIDO U2F instructions on https://developers.yubico.com/SSH/ on macOS Monterey with openSSH 8.6 and run into the following issue: ~ ssh-keygen -t ecdsa-sk -f ~/.ssh/id_ecdsa_sk Gen...

I'm testing Yubico YubiKey 5 NFC. I use KeePassXC to save sensible information. KeePassXC accepts YubiKeys, but only one. Is it possible to add more than one to a .kdbx file?

I am trying to import a openssl generated ed25519 key into Yubi HSM 2 I am following the steps described here: https://developers.yubico.com/yubihsm-shell/yubihsm-wrap.html echo -en '\x00\x11\x22\...

I need to generate a new key pair for signing on Yubikey but I would like to "backup" old key. The yubico-piv-tool documentation mentions slots 82-95 for Retired Key Management, which seems to be f...

I'm trying to implement PGP encryption based on Yubikey NEO OpenPGP Smart Card applet in a Java application. It seems to be a dark art and is not easy to google this stuff but here is where I got s...