ies, electrical grids, military plans, nuclear reactors, and remotely operated weapons. Foreign governments as well as individuals and groups of individuals originate these attacks. A common strategy in many attacks is to look for weaknesses in computer systems and use them as a way to access information or plant software bugs. Cyber terrorism attacks not only cause computers systems to malfunction; they can also disable computer-controlled weapons systems. This is what happened in Sep- tember 2010 when a worm dubbed Stuxnet attacked one of Iran's weapon control sys- items. A worm is a software bug programmed to be activated at a later time. The Stuxnet attack was SO sophisticated that many security experts thought a government, not an individual, planned it. Attacks on Enterprises Both enterprises and governments are under siege from hackers. All multinational busi- nesses have been the targets of security attacks. In some attacks, credit card numbers and personal identification are stolen for financial gain. Other hackers steal informa- tion for insights on competitive strategies and product plans. Both the government and private sector acts of sabotage can involve planting delayed software bugs that damage networks and databases. There are many types of security breaches. Distributed Denial-of-Service (DoS) attacks involve sending millions of packets to a site simultaneously. This has the poten- tial to disable entire sites by making it difficult for the site to handle legitimate traffic. Organizations use a variety of strategies to thwart hackers and prevent data breaches. These include routing traffic through carriers and security company networks to screen incoming traffic, purchasing a variety of security hardware and software, training end The Internet users on the importance of keeping information private and secure, and hiring outside consultants. However, as security methods improve, hackers eventually become familiar with them and devise new ways to breach them. It is a constant battle between improvi