The timeframe in history that Uses digital technology became prevalent and of common use in the world through the net applications and social networks, organizations across the world generate a large amount of data daily. So guaranteeing secured and safe transmission of data becomes important as society is moving towards digital information age. Information security is the most extreme basic issue in guaranteeing safe transmission of data through a web. As more and more users connect to the internet it attracts a lot of cyber-attacks. It’s required to protect the computer and network security which forms the critical issues. In this paper, we provide an overview of network security and various techniques through which Network security can. Be enhanced mainly using Cryptography.