Security of Information while communication through cryptography Techniques

The purpose of this paper is to provide a survey of both the principle and practice of Cryptography .How the person can secure their information by intruders every person wants their information should be secure. Number of techniques is used for the security purpose. This technique is useful for the secure transmission of data. Protect confidential data by unauthorized user. Cryptography is the techniques for security of data by threats which attack on the information. In which different algorithm are used such as Encryption Algorithm which Create a security key that no unauthorized user can read and the Decryption Algorithm which decrypt the text or message by the Decryption key.AES is Advanced Encryption Standard is a Symmetric algorithm .It is an algorithm that is used for Encrypting the information between two parties across unsecured connection