Cool, bit of googling and found 'FIDO U2F Security Key' (USB) for £5 I expect those will turn up in our local supermarkets pretty soon. Someone should give the

Cool, bit of googling and found 'FIDO U2F Security Key' (USB) for £5 I expect those will turn up in our local supermarkets pretty soon. Someone should give these hardware keys a better name. E.g. your "Privacy Lock" or something similar. Much easier to explain than a "FIDO U2F" ... whatever those letters all jumbled together mean.