ABSTRACT:

As there is large advancements in internet technology, there has been huge text as well as multimedia data transfer over the internet. Due to this data security is a vital necessity. Steganography and Cryptography are the sets of techniques to provide security to data. Steganography is an art of hiding secret information into another cover medium like image, etc. Cryptography is an art of converting plain data into unreadable format. Steganography can be integrated with Cryptography in order to enhance the security of data in communication. In this paper, a new method is proposed to provide security to color images, by integrating Steganography and Cryptography. In this method, randomized LSB based method is used to hide an image in another image. The resulting stego image is then encrypted using AES algorithm. This new integrated method ensures the enhancement in the data hiding capacity, the security of the image and lossless recovery of the secret data.

INTRODUCTION:

Secure communication is when two entities are communicating and do not want a third party to listen in. For that they need to communicate in a way not susceptible to eavesdropping or interception.
Secure communication over insecure channels such as the Internet has been a hotspot in the research field since the beginning of the digital age. With the continuous evolvement of symmetric and asymmetric key cryptography, data communication over the Internet can be made secure and private.
For many years it has been considered that security in cryptographic algorithms is directly related to the complexity of the mathematical operations that define the core of the encoding process. However, research using hardware-aided reverse engineering has continuously demonstrated that every cryptographic algorithm has a relatively short lifecycle, defined by the evolvement of computational power. A secure communication system is reliable as long as the cryptographic algorithm on top of which it was built is reliable

PROBLEM STATEMENT:

One of the major problems in most secure communication systems is represented by data interception. Regardless of how strong the cryptographic component of a system is, once an unauthorized party has intercepted the encrypted data, it is a matter of time until the once strong encryption algorithm(s) is proven weak or faulty and the stored data can be extracted.

OBJECTIVE:

The main objective of this project is to develop an algorithm for secure communication using stenography and cryptography method. Such that while data transferring it no one can access the data accept authorized user

ADVANTAGES:

It uses higher length key sizes such as 128, 192 and 256 bits for encryption. Hence it makes AES algorithm more robust against hacking.
It is most common security protocol used for wide various of applications such as wireless
For 128 bit, about 2128 attempts are needed to break. This makes it very difficult to hack it as a result it is very safe protocol.