Answer
The methods of fraud detection are:
Conduct frequent audits:
The periodical internal and external audit should be done to detect fraud and compute abuses. Auditors should regularly test system controls and periodically browse data files looking for suspicious activities.
Use of Computer Security officer:
Sometime fraud cannot be detected using only auditors so own computer security officer is essential. Security officer keeps on monitoring different security threats to reduce the fraudulent activity.
Fraud Detection Computer software:
The spying software for the detection of fraudulent activity can be used to reduce the threats. These will be dedicated software application to analyze the pattern of the data access, log files and services used to detect the fraud.