> Plenty of countries make their numbers de jure public information.
That's the difference. A lot of people and processes in the US make the assumption that the SSN is a well kept secret despite them being publicly leaked so many times. This assumption is a weakness for any process that relies on "secret" SSNs.
That's the difference. A lot of people and processes in the US make the assumption that the SSN is a well kept secret despite them being publicly leaked so many times. This assumption is a weakness for any process that relies on "secret" SSNs.