One of the world's leading cyber security experts says information from a hacking incident like the one in South Carolina is usually sold quickly on the Internet black market.
Michael DuBose says hackers sell Social Security and credit card information in batches of thousands on the Internet black market and the chances of finding and prosecuting the hacker are generally slim.
DuBose is former chief of the U.S. Justice Department's computer crime section and now works for international cyber security company Kroll.
Authorities are investigating the hacking of 3.6 million South Carolina tax returns.
They say the hacking came from an international IP computer address. But DuBose says it's easy for hackers to remain anonymous and the portal could have been a proxy for a site anywhere in the world.
The state has set up a year of daily monitoring of the three credit bureaus and a lifetime of over-the-phone help on resolving identity theft after it happens.
People are asked to visit protectmyid.com/scdor and enter code SCDOR123 or call 1-866-578-5422 to determine if their Social Security number was accessed.
Haley said Wednesday that Dun and Bradstreet Credibility Corp. will offer free credit-monitoring service to any businesses affected by the hacking case. She said the businesses can sign up for the service at dandb.com/sc or by calling 800-279-9881 beginning at 8 a.m. Friday.
Copyright 2012 FOX Carolina (Meredith Corporation). All rights reserved. The Associated Press contributed to this report.
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