Improved Communication Security and Enhance Reliability Using Cryptography and Steganography

Abstract

Increased use of technologies and computers has profited humans in many ways but also have resulted in various security concerns. And these security concerns are breached onto the path over which the data is to be transferred. Sending normal messages over the Internet is no longer a secure method for data sharing. In this paper, we have determined how can we provide an encrypted
message so that there will be no fear of data Integrity, Confidentiality, etc. The way of propagation of the data or the thing can be in any form such as sound, video, text message, audio, etc, but here we have focused on text messages. This project first sends the message which is taken in the text format and then that text data is encrypted by using some cryptographic techniques. Then the encrypted message or the data that has been encrypted using the cryptographic technique is embedded in the image form by using some of the steganographic techniques. Now whatever image we have taken up can be sent over the internet for transferring any hidden message or confidential message to the person. After that, we can decode it on the other side. We have also performed some comparison based studies by using some set of algorithms by comparing cryptographic and steganographic techniques. As focusing on security purposes, the combination of steganography with cryptography improves communication security and enhances reliability by encrypting the commencing message and hiding the same message. There are important tools that help utterly in cybersecurity. This paper comprises various algorithms used such as RSA, AES, DES, DCT, OTP, etc. These are the algorithms of symmetric, asymmetric cryptography, and steganography.