New Jersey has not monitored access to key personal information in a computer system that tracks care for the poor, making it possible that Social Security numbers and other information about doctors and patients have been misused, according to a state audit. The analysis determined that the Department of Human Services lacks appropriate security policies and procedures for the computer system it uses to process claims for more than one million New Jersey Medicaid patients. The audit is the third in recent weeks to criticize New Jersey's $9 billion Medicaid program, with others finding people earning as much as $295,000 enrolled in the program and questionable medical equipment purchases.