Securing Multimedia Content Using Watermark and Digital Signature

With the increasing rate of multimedia usages, many processes have been introduced to ensure the safety of their contents. Digital signature and watermarking are the processes that are used in cryptography and digital image transmission respectively. These two techniques can be combined for secure multimedia transmission. Over the years, these technologies have been able to secure the data of text documents but securing multimedia contents have been a difficult task. Therefore, this research proposed to use the digital signature and watermarking to secure multimedia data. The multimedia data is embedded with another data and is transmitted after encrypting it using the cryptographic algorithms. The receiver end decrypts the data and extracts the original data from the watermark. For digital watermarking, various transformations have been suggested. In this exploration, Discrete Wavelet Transform (DWT) has been used as it shows better results in digital watermarking applications.