In the United States, a Social Security number is a nine-digit number issued to U.S. citizens, permanent residents, and temporary residents under section 205 of the Social Security Act, codified as 42 U.S.C. ยง 405. From Wikipedia
The crypto giant faces lawsuits, regulatory scrutiny, and up to $400 million in remediation costs after hackers stole personal data from less than 1% of users.