Cryptography Algorithms and approaches used for data security

In separate used systems, the computers are exposed to the other users. To keep the data secured from different users various encryption algorithms are entered. As computer systems become more pervasive and complex, security is increasingly important. Cryptographic algorithms and protocols constitute the central component of systems that protect network transmissions and store data. Encryption is the translation of data to a secret code. Apart from its uses in Military and Government to facilitate secret communication, Encryption is used in protecting many kinds of civilian systems such as Internet e-commerce, Mobile networks, automatic teller machine transactions, copy protection (especially protection against reverse Engineering and Software piracy), and many more. The Encrypted data can only be deciphered if one has the password or the Key. The Encryption algorithm is a set of well defined steps to transform data from a readable format to an encoded format using the Key. This set of well defined steps is also called cipher.