UH was contacted in May about student names and Social Security numbers being posted. It said the mistake happened in October 2005 when a math department lecturer placed student grades on a university Web server.
Officials learned of the error in May and removed the information from the servers.
The school says at least two more months of work were required to ensure the information had been removed from Internet search engines.
The Liberty Coalition says similar breaches have happened at the University of Texas at Austin, Virginia Tech and Central Florida.
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