1. Chapter 3 Ethics, Fraud, and Internal Control Accounting Information Systems, 5 th edition James A. Hall COPYRIGHT © 2007 Thomson South-Western, a part of The Thomson Corporation. Thomson, the Star logo, and South-Western are trademarks used herein under license

2. Using the general IS model, explain how fraud can occur at the different stages of information processing?

3. Data Collection Fraud This aspect of the system is the most vulnerable because it is relatively easy to change data as it is being entered into the system. Also, the GIGO (garbage in, garbage out) principle reminds us that if the input data is inaccurate, processing will result in inaccurate output.

4. Data Processing Fraud Program Frauds altering programs to allow illegal access to and/or manipulation of data files destroying programs with a virus Operations Frauds misuse of company computer resources, such as using the computer for personal business

5. Database Management Fraud Altering, deleting, corrupting, destroying, or stealing an organization’s data Oftentimes conducted by disgruntled or ex-employee

6. Information Generation Fraud Stealing, misdirecting, or misusing computer output Scavenging searching through the trash cans on the computer center for discarded output (the output should be shredded, but frequently is not)

7. Internal Control Objectives According to AICPA SAS 1.Safeguard assets of the firm 2.Ensure accuracy and reliability of accounting records and information 3.Promote efficiency of the firm’s operations 4.Measure compliance with management’s prescribed policies and procedures

8. Modifying Assumptions to the Internal Control Objectives Management Responsibility The establishment and maintenance of a system of internal control is the responsibility of management. Reasonable Assurance The cost of achieving the objectives of internal control should not outweigh its benefits. Methods of Data Processing The techniques of achieving the objectives will vary with different types of technology.

9. Limitations of Internal Controls Possibility of honest errors Circumvention via collusion Management override Changing conditions--especially in companies with high growth

10. Exposures of Weak Internal Controls (Risk) Destruction of an asset Theft of an asset Corruption of information Disruption of the information system

11. The Internal Controls Shield

12. Preventive, Detective, and Corrective Controls

13. Auditing Standards Auditors are guided by GAAS (Generally Accepted Auditing Standards) 3 classes of standards: –General qualification standards –Field work standards –Reporting standards For specific guidance, auditors use AICPA SAS (Statements on Auditing Standards)

14. SAS 78 / COSO Describes the relationship between the firm’s… internal control structure, auditor’s assessment of risk, and the planning of audit procedures How do these three interrelate? The weaker the internal control structure, the higher the assessed level of risk; the higher the risk, the more auditor procedures applied in the audit.