Cyber security plays a key role in the realm of information technology. The requirement for extra information is one of the principal problems of the present. When talking about cyber security, the phrase "cyber warfare" immediately comes to mind, and it is getting worse every day. Many governments and companies are waging a determined battle against cybercrime. Despite several efforts, cyber security continues to worry a lot of people. This essay focuses on the vulnerabilities that the most recent technologies have in terms of online security. It also emphasizes ethical issues, contemporary cyber security techniques, and the adaptability of online security.
Key words: cyber security, phishing, cyber crime, malware.