Cyber security refers to the practice of protecting computers, computer networks, servers, mobile devices, software, databases and digital information from unauthorized access, misuse, damage, disruption or theft. In e-commerce, cyber security is particularly important because online transactions involve sensitive information such as customer names, addresses, passwords, payment details, bank account information and credit or debit card details. The main objectives of cyber security are to maintain confidentiality, integrity and availability of information and to ensure that electronic transactions are safe and reliable. Cyber security uses various technologies and procedures such as encryption, authentication, firewalls, antivirus software, intrusion detection systems, secure payment gateways, access controls and regular security updates. Encryption converts information into an unreadable form so that unauthorized persons cannot understand it. Authentication verifies the identity of users before allowing access, while firewalls monitor and control network traffic. Strong passwords and multi-factor authentication further reduce the possibility of unauthorized access. Cybercrime refers to illegal activities carried out using computers, digital devices, communication networks or the internet. With