Audio Watermarking with Error Correction

Abstract

Abstract-In recent times, communication through the internet has tremendously facilitated the distribution of multimedia data. Although this is indubitably a boon, one of its repercussions is that it has also given impetus to the notorious issue of online music piracy. Unethical attempts can also be made to deliberately alter such copyrighted data and thus, misuse it. Copyright violation by means of unauthorized distribution, as well as unauthorized tampering of copyrighted audio data is an important technological and research issue. Audio watermarking has been proposed as a solution to tackle this issue. The main purpose of audio watermarking is to protect against possible threats to the audio data and in case of copyright violation or unauthorized tampering, authenticity of such data can be disputed by virtue of audio watermarking.

Audio Watermarking with Encryption

“…The DFT requires an input function that is discrete. Need for Encryption [7,8] Encryption is the process of transforming data into scrambled unintelligible cipher text using a key. The role of encryption is to secure information when it is stored or in transit.…”

“…In symmetric key algorithms, the sender and receiver use the same keys for encryption as well as decryption. Symmetric key encryption is also known as secret key as both, the sender and receiver have to keep the key protected [7,10]. The level of security entirely depends on how well the sender and the receiver keep the key protected.…”

“…Symmetric key provides confidentiality but not authenticity as the secret key is shared [8]. Asymmetric keys on the other hand, provide both authentication and confidentiality [7,8].…”