Probability Based Selective Encryption Scheme for Fast Encryption of Medical Images

Hiding data using encryption is the major solution to deliver security for data transmitted over a connection amongst any pair of nodes, however by adopting selective encryption, the speed and security can be provided by encoding only a specified portion of the data bit. Visual and multimedia data protections such as images require special design considerations for use in medical applications. This research focuses on choosing an significant part of the medical image to hide the secret data and that can be achieved efficiently by selecting parts of the image that are more used in the normal mode. When the process of encryption is complete, the secured and encrypted data is transmitted to ensure a safe transport and delivery over the public network. This paper intends to propose a novel approach to encrypt data in medical images using probability equation for random selection of blocks for encryption. The background idea with respect to the proposed effort is to encrypt only fragment of the image for encryption using AES algorithm instead of encrypting the whole image. By doing this we can save computation power, time and speed than using the traditional approach.