Reversible and Secured Image Watermarking Technique for IoMT Healthcare

Abstract

In recent days, IoMT based medical treatment and diagnosis is so popular in health-care domain. The IoMT collects the medical data from patients on real time and sends over insecure channels. This leads to various authentic and security threats. To address these concerns, in this paper a region based reversible Medical Image Watermarking (MIW) approach is proposed in spatial domain to ensusing low real time computational complexity. First the cover image is divided into Border Region (BR) and Non Rorder Region (NBR). Binary hospital logo image is embedded in BR using LSB to achieve authentication. Encryted Electronic Patient Record (EPR) information is embedded in NBR to achieve confidentiality. A reversible quadratic difference expansion approach with low computational cost and high embedding capacity is proposed for EPR embedding. To achive high EPR security, a Pseudo Random key is used in encryption. A Pseudo random key is generated using Playfair cipher approach. A <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$16 \times 16$</tex> Playfair is used for generation of Pseudo Random key. The obtained experimental results show the proposed scheme is superior as compared to previous works in terms of security, embedding capacity and have low computational time complexity. Thus the scheme can be used in real time healthcare industries for IoMT.