Time for services everywhere to stop using SSNs for identification and for the US to move on to a more advanced form of identification. And lock your credit.
What can an attacker who knows your SSN still do with that information nowadays? Genuinely curious, as the SSN is just this strange in distinct password thingy the Europeans like me hear about on HN but have no actual parallels with.
Fortunately, it's getting harder without previous addresses or other verification methods.
For non-Americans that don't know, our Social Security number is generally assigned at birth or when you become a citizen by the Social Security Administration. Social Security is a disabled or elderly benefit we all pay into (roughly 7.5% employee and 7.5% employer - ~15% total). It's the only number we all get, since not everyone gets a driver's license; ID; passport; or other identifier. Unfortunately, it's been used to identify us for everything, and until recently was typically in plaintext on most forms (medical; tax; student; etc...).
CGP Grey has a good summary of how it came about and why it's become a problem: https://www.youtube.com/watch?v=Erp8IAUouus