Computer Fraud - Chapter 5
Threats to AIS
- Natural and Political Disasters: Includes events like storms, hurricanes, tornadoes, and earthquakes.
- Software Errors and Equipment Malfunctions: Software bugs that impair business operations.
- Unintentional Acts: Mistakes made by humans.
- Intentional Acts:
- Computer crime.
- Fraud.
- Intentional sabotage of information systems.
- Reference to Brian Krebs' blog (krebsonsecurity.com).
Fraud
- Definition: Any means used to gain an unfair advantage over another person.
- Elements:
- False statement, representation, or disclosure.
- Material fact inducing action by a victim.
- Intent to deceive.
- Victim reliance on misrepresentation.
- Injury or loss suffered by the victim.
- Characterization:
- White-collar crime: Financially motivated, nonviolent crime.
- Examples: Identity theft.
- Often perpetrated by knowledgeable insiders.
Two Categories of Fraud
- Misappropriation of Assets:
- Theft of company assets.
- Includes physical assets (e.g., cash, inventory) and digital assets (e.g., intellectual property, customer data).
- Fraudulent Financial Reporting:
- "Cooking the books".
- Examples: Booking fictitious revenue, overstating assets.
Auditor’s Responsibility (SAS No. 99 / AU-C Section 240)
- Requirements:
- Understand fraud.
- Discuss the risks of material fraudulent misstatements.
- Obtain information.
- Identify, assess, and respond to risks.
- Evaluate audit test results.
- Document and communicate findings.
- Incorporate a technology focus.
Conditions for Fraud (Fraud Triangle)
- Three conditions must be present for fraud to occur:
- Pressure:
- Employee:
- Financial pressures.
- Lifestyle pressures.
- Emotional pressures.
- Financial Statement:
- Financial pressures.
- Management pressures.
- Industry conditions.
- Opportunity:
- To commit fraud.
- To conceal fraud.
- To convert assets to personal gain.
- Rationalization:
- Justifying behavior.
- Attitude that rules don’t apply.
- Lack of personal integrity.
- Indicators related to Pressure, Opportunity, or Rationalization:
- Significant cash flow problems or difficulties in collecting receivables or paying payables.
- Dominant and unchallenged management.
- The perception that everyone is committing fraud.
Computer Fraud
- Definition: Fraud committed using a computer.
- Classifications:
- Input fraud.
- Processor fraud.
- Computer instruction fraud.
- Data fraud.
- Output fraud.
- Example: The movie "Office Space," where employees change computer code to divert fractions of pennies to their account.
- Other movies with fraud-related plots: "Catch Me If You Can," "The Informant!"
Preventing and Detecting Fraud
- Make Fraud Less Likely to Occur
- Organizational Systems:
- Create a culture of integrity.
- Adopt a structure that minimizes fraud; create governance (e.g., Board of Directors).
- Assign authority for business objectives and hold individuals accountable; ensure effective supervision and monitoring.
- Communicate policies.
- Develop security policies to guide control procedures.
- Implement change management and project development acquisition controls.
- Make It Difficult to Commit
- Organizational Systems:
- Develop strong internal controls.
- Segregate accounting functions.
- Use properly designed forms.
- Require independent checks and reconciliations.
- Restrict access.
- Implement system authentication.
- Use computer controls over input, processing, storage, and output.
- Use encryption.
- Fix software bugs and update systems regularly.
- Destroy hard drives when disposing of computers.
- Improve Detection
- Organizational Systems:
- Assess fraud risk.
- Conduct external and internal audits.
- Establish a fraud hotline (e.g., In Dubai - 800-2626).
- Maintain an audit trail of transactions.
- Install fraud detection software.
- Monitor system activities (user and error logs, intrusion detection).
- Reduce Fraud Losses
- Organizational Systems:
- Insurance.
- Business continuity and disaster recovery plan.
- Store backup copies of program and data files in a secure, off-site location.
- Monitor system activity.
Key Terms
- Sabotage
- Cookie
- Fraud
- White-collar criminals
- Corruption
- Investment fraud
- Misappropriation of assets
- Fraudulent financial reporting
- Pressure
- Opportunity
- Rationalization
- Lapping
- Check kiting
- Computer fraud
Case Study: Check Kiting
- Scenario: An executive confesses to kiting 100,000.
- What is kiting, and how can it be prevented?
- How to respond to the confession?
- What issues to consider before pressing charges?
Check Kiting Explained
- Definition: Creating cash using the time lag between check deposit and clearance.
- Illegally exploiting float time between banks, creating false balances and accessing unavailable money.
Example of Check Kiting
- Person A has two bank accounts:
- Bank 1 (Account A): Little money.
- Bank 2 (Account B): Little or no money.
- Steps:
- Person A writes a check for 5,000 from Account A (Bank 1) and deposits it into Account B (Bank 2).
- Bank 2 credits Account B with 5,000 immediately (banks often make funds available before clearance).
- Note: Regulations (e.g., U.S. Federal Reserve’s Regulation CC) require banks to make certain amounts available quickly (e.g., 225 the next business day in the U.S.).
- Before Bank 1 realizes insufficient funds in Account A, Person A withdraws 5,000 from Account B (Bank 2).
- Bank 1 finds insufficient funds and returns the check unpaid.
- Result:
- Bank 2 is missing 5,000.
- Person A has taken the money, benefiting from "created" money.
Real-World Cases of Check Kiting
- First National Bank of Keystone:
- Executives involved in a famous check kiting scandal in the late 1990s.
- Lesson: Check kiting can collapse banks/companies (e.g., a loss of 778 million).
- Frank Abagnale:
- Forged and passed checks worth millions in the 1960s.
- His life story was popularized by the movie "Catch Me If You Can."
- Lesson: Trust in appearance can be dangerous.
Responding to a Check Kiting Confession
- Detection: Analyze all interbank transfers; a significant increase is a red flag.
- Immediate Actions:
- Investigate the fraud and determine actual losses (employees may under-report).
- Determine controls to prevent or detect similar frauds.
Issues to Consider Before Pressing Charges
- Impact on the business's future success.
- Effect of adverse publicity.
- Social responsibility.
- Strength of evidence for conviction.
- Message sent to other employees.
- Potential civil liabilities.
Review Question
- Which control is most important to deter fraud?
- (c) Segregation of duties (Correct).