ENCRYPTION OF COMPRESSED DATA USING SIMPLIFIED ADVANCED ENCRYPTION STANDARD (S-AES)

Abstract

With the fast progression of data exchange in electronic way, information security is becoming more important in data storage and transmission. While storing and transmitting multimedia data are not easy and they need large storage devices and high bandwidth network systems. Compression and encryption technologies are important to the efficient solving of network bandwidth and security issues. This paper focus on dual approach of compression and security where compression is achieved through lossless algorithm (Huffman coding) according to size of compressed data is encrypted using traditional S-AES Algorithm. Cryptography is a important part of preventing data and which is deal with secret transmission of message between two or more parties in world.
Encryption techniques ensure security of data during transmission. However in most cases this increases the length of the data, thus increasing the cost. When it is desired to transmit, it is customary to first compress the data and then encrypt it. The Compression to removing the excessive information in file. The new compression and encryption algorithm is proposed to more protection. The techniques compress the data to reduce its Average length of the code in data.
Afterward compressed data is encrypted and then further compressed using a new encryption algorithm without compromising the compression efficiency and the information security. This Huffman algorithm provides a higher compression ratio and enhanced data security. The S-AES provides more confidentiality and
authentication between two communication systems