Network Security Issues and Cryptography

In the recent years there have been a radical evolution in the aspects and requirements of network security. Networks are subject to attacks from malicious sources. There are different factors contributing to these changes. There is a shift from threats like Denial of Service (DoS) to dynamic content-based attacks like rootkits, key loggers, and Virus, Worms, Trojans and Phishing. Network security is responsible for securing all information passed through the network. Network security starts with authenticating, commonly with a username and a password. One of the techniques used in network security is Cryptographic.Cryptographic is a looming technology, which is important for security. As applied to computer network security, cryptography protects data from theft or alteration and can also be used for user authentication. This paper describes the vulnerability and various threats in network, analysis of current network security and issues with current security solutions and also the Cryptographic techniques used in network security