Secure Data Transfer through Audio Signal with LSA

Today's large demand of internet applications requires data to be transmitted in a secure manner. Data transmission in public communication system is not secure because of interception and improper manipulation by eavesdropper. So the attractive solution for this problem is steganography. Steganography is the scheme of hiding the existence of secret information by concealing it into another medium such as image, video or audio. Cryptography is used to encrypt the data so that it is unreadable by a third party. So to add another layer of protection we can encrypt the key of the hidden message. This paper proposes a new algorithm to hide the data in Audio signal and it uses Linear Subsequence Algorithm (LSA) which increases data protection.