It is often easy to misuse data stored on a computer because:

• Alterations can be made without leaving a trace;
• Very large amounts of data can be stored and searched quickly;
• Data can be instantly transferred to other locations using e-mail and the Internet;
• Communications links used to connect computer systems together are vulnerable to attack from hackers. Some hackers create aggressive software that can manipulate or destroy computer programs and data
• Programs can be designed to deliberately cause damage to computer systems. Viruses and logic bombs are examples of such programs