Cyber security involves protecting computers, networks, programs and data from unauthorized access and cyber attacks. It includes communication security, network security and information security to safeguard organizational assets. Cyber crimes are illegal activities that use digital technologies and networks, and include hacking, data and system interference, fraud, and illegal device usage. Some early forms of cyber crime date back to the 1970s. Maintaining antivirus software, firewalls, backups and strong passwords can help protect against cyber threats while being mindful of privacy and security settings online. The document provides an overview of cyber security, cyber crimes, their history and basic safety recommendations.