Email account that works for this mailing list _and without a cell phone number_

[Ralf Mardorf]

On Sun, 2025-10-19 at 01:52 -0400, Jeffrey Walton wrote:
> I don't even have a cell phone.

Neither do I.

> I now use a device-based authenticator -- a YubiKey.

I have one that is from and for things related to my employer. It's
currently lying around unused, which is not my fault.

# systemctl start pcscd.service
# exit
$ ykman info
Device type: Security Key NFC
Firmware version: 5.7.4
Form factor: Keychain (USB-A)
Enabled USB interfaces: FIDO
NFC transport is enabled

Applications	USB          	NFC         
Yubico OTP  	Not available	Not available
FIDO U2F    	Enabled      	Enabled
FIDO2       	Enabled      	Enabled
OATH        	Not available	Not available
PIV         	Not available	Not available
OpenPGP     	Not available	Not available
YubiHSM Auth	Not available	Not available

In my private life, I can't think of anything that such a key could be
good for.

I can use OTP for one German authoritie. For OTP, I use GNOME
Authenticator, among other things.

PayPal, a US company, relies on SMS to mobile phones here in Germany.
IOW no NIST standard here.