About 3.6 million tax returns from as far back as 1998 have been hacked in South Carolina. Experts say it may be the largest cyber-attack against a state tax department in the nation's history.
State and federal officials are investigating the hacking they say may have started in August and was discovered last month. They say the vulnerability in the system has been fixed. The 3.6 million tax returns filed since 1998 included millions of Social Security numbers and about 387,000 credit and debit card numbers that were also exposed, 6,000 of those unencrypted. Tax information from businesses across the state may also have been accessed.
There have been bigger security breaches of information that could lead to identity theft in both the private sector and the federal government.
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