More examples of other countries (and their solutions, not particulrly hard) in this thread: https://news.ycombinator.com/item?id=15210634 https://news.ycombin

More examples of other countries (and their solutions, not particulrly hard) in this thread: https://news.ycombinator.com/item?id=15210634 https://news.ycombinator.com/item?id=15210634 The "secrecy" of the SSN is seemingly an US only problem, that all the rest of the word has already solved, one way or the other, so, no it it is not "harder than you think", it is "not hard at all" ...