Apparently, this user prefers to keep an air of mystery about them.
4 Lost Smart Card - extract private key? Feb 17 '14
3 Protecting server from physical access? Mar 13 '14
3 SmartCard Key Extraction / Alternatives Apr 11 '14
3 GnuPG + Yubikey 4: How to manually check that all keys are where they belong (on the Yubikey only)? Jan 3