The average loss in a bank robbery is several thousand dollars, and the culprit has an 85 percent chance of being caught. The average dam- age in a “usual” white-collar fraud is several tens of thousands of dollars. The average amount stolen in computer fraud against organizations is several hundreds of thousands of dollars, and it is extremely hard to find the culprit. Why is the amount involved in computer fraud so high, and why is it difficult to find the ulprits?