Abstract
This paper presents a novel secure medical image transmission scheme using hybrid visual cryptography and Hill cipher (HVCHC) between sender and receiver. The gray scale medical images have been considered as a secret image and split into different shares by visual cryptography (VC) encryption process. The split shares are once again encoded by Hill cipher (HC) encode process for improving the efficiency of the proposed method. In this process, the encrypted medical image (shares) pixels are converted as characters based on the character determination (CD) and lookup tables. In result, a secret image is converted into characters. These characters are sent to the receiver/authenticated person for the reconstruction process. In receiver side, the ciphertext has been decoded by HC decode process for reconstructing the shares. The reconstructed shares are decrypted by the VC decryption process for retaining the original secret medical image. The proposed algorithm has provided better CC, less execution time, higher confidentiality, integrity, and authentication (CIA). Therefore, using this proposed method, cent percent of the original secret medical image can be obtained and the secret image can be prevented from the interception of intruders/third parties.
Highlights
Cryptography is a method which is used to convert an original message into cipher message
This paper presents a novel secure medical image transmission scheme using hybrid visual cryptography and Hill cipher (HVCHC)
In order to fulfill the same, this paper has introduced a HVCHC cryptographic system for medical image transmission
Summary
Cryptography is a method which is used to convert an original message into cipher message. Manimurugan and Porkumaran introduced a novel encryption scheme based on the visual cryptography In this proposed method, the given medical image had encrypted and compressed before the transmission. This scheme had the feature of (k, n) threshold with no pixel expansion, which could be loss-tolerant and control access for a wider application. Madhuravani in 2012 introduced a modified Hill cipher using randomized approach In this proposed technique, the plain text is divided into equal sized blocks. This paper presents a novel secure medical image transmission scheme using hybrid visual cryptography and Hill cipher (HVCHC).
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