Increasing volumes of data are being stored and processed on computers and other devices, and cyber security is critical because of this. Intellectual property, financial data, personal information, and other types of data may all contain sensitive information that should be protected against unwanted access or exposure. While doing business, organizations send and receive sensitive data via networks and to other devices, and cyber security is the field dedicated to safeguarding that data and the technologies used to handle or store it. Companies and organizations, especially those responsible for protecting national security, health, or financial data, need to take action to protect their sensitive business and people information as the volume and sophistication of cyber-attacks grows. Before terrorism, cyber strikes and digital surveillance are the greatest threat to national security, according to the nation's highest-ranking intelligence officers as far back as March 2013.