As the users of computers increase similarly usage of the internet also increases. The usage of the internet is common and important to personal computers, computers in organizations, and most secure military computers. Internet, as well as network applications, are increasing rapidly, the internet structures are not secure themselves and therefore allow many security threats and attacks to occur. There are a lot of techniques and methods for network security. Cryptography is a strong encryption technique that is remarkably hard to break. It converts the information from its original form to an un-understandable and scribbled form. There are many cryptographic techniques and in this paper, we will discuss the cryptographic techniques in terms of secure, fast, quality, and block size.