Data Security using Cryptography and Steganography

As use of computer networks and internet is growing very fast and admiring day by day, information security is become a major concern in computer networks. There is always risk in violation of network security which leads a need of an efficient and simple way of securing the electronic documents from being read or used by people other than who are authorized to do it. Encryption is one of the security technique widely used to ensure secrecy. Encryption is an entirely mathematical process that takes in data, performs some predefined mathematical operations on the data, and then outputs the result. Blowfish is one of the superlative encryption algorithms because it requires less execution time, memory and has high throughput. However if any eavesdropper detects the presence of encrypted data he or she can try several attacks in order to get the original data. So there is a need to provide a two layer approach for better security. That's why this work presents a security system using combination of cryptography and steganography to enhance the security.