https://www.theregister.co.uk/2017/10/04/white_house_plans_to_ditch_social_security_numbers_as_ids/ >White House cybersecurity coordinator Rob Joyce has won the backing of Equifax's ex-CEO for a plan to stop using social security numbers as personal identifiers in the US. >We have no idea of Joyce's opinion of the endorsement, but what we do know is that he floated the notion in a speech given to a Washington Post-sponsored cybersecurity conference on Tuesday. Joyce suggested using a "modern cryptographic identifier" – presumably a hash or public-private key pair or something – to identify individual US taxpayers rather than the usual nine digits.