Abstract: Security is the major concerns when the transmission of the data is perform over the network because intruders/attackers of the network steal most of the information from it. So before transmission of the data sender must make secure it by using some of the encryption techniques from the various security techniques available such as DES, AES, MD5, SHA etc. Most of the encryption technique uses secret key to prevent the data from an unauthorized access. In this paper we have discussed various encryption algorithms after study various researches paper and also compare them. Here we suggested AES Encryption algorithm with RGB substitution techniques for the encryption of our data. To provide the strength of our algorithm hidden key is also sent along with data which solves the problem of key exchange which arises in encryption techniques.
Keywords: Hidden Key, Intruders, Symmetric key, Asymmetric key, Encryption, Decryption, AES, DES, MD5, SHA, RGB