A Review on Compression and Encryption of Data for Secure Transmission

Data is the digital information to be stored in the computer in the form of text documents, audios, videos, or other types of data. Security is about, the protection of those assets stored in a computer. Compression algorithms can be used to reduce the redundancy of the data representation. Data compression is a very good technique which can be used to reduce the size of the data and storing the same amount of data comparatively smaller bits resulting in reducing the data storage space, resource usage. There are a lot of techniques have been implemented for the process of data compression which can be categorized as Lossy and Lossless data compression techniques. Data compression is an attractive approach to reduce the communication cost by effectively utilizing the available bandwidth in the data links. This data represents a variety of objects from the various multimedia data such as text, images, videos, sound clippings, computer programs, graphs, charts, maps, tables, etc. Over the last era, there has been recording explosion in the amount of digital data transmitted through Internet, representing text, images, video, sound, computer programs, etc. The researchers are developing the novel algorithms which can be used for data compression. It is also important to consider the security aspects of the data being transmitted while compressing it, as most of the data transmitted over the Internet is very much vulnerable to an aggregate of attacks. This presentation is focused on addressing this problem of lossless compression of multimedia files with an added security.