DHS did not perform security background checks on employees of the software contractors that developed and maintain the system, Butkovitz said, and former city social workers have continued to have access to it -- including one who left about 15 years ago.
"Unauthorized access increases the risk that confidential data could be compromised and abused," Butkovitz said in a news release. His office said it was unaware of any situations where unauthorized personnel looked at case records.
DHS officials told the Controller's Office that they were upgrading the agency's computer security with new safeguards to be in place in December.
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