Ah, it looks like their FAQ also says this is supported: Can I use the same Secu...

		semenko on Oct 21, 2014 \| parent \| context \| favorite \| on: Strengthening 2-Step Verification with Security Ke... Ah, it looks like their FAQ also says this is supported: `Can I use the same Security Key with multiple Google Accounts? Yes. You can register the same Security Key with multiple Google Accounts.` https://support.google.com/accounts/answer/6103543?hl=en