Research Article - Biomedical Research (2018) Volume 29, Issue 19

Quantum-assisted CR directed encrypted biomedical signal transmission using knight's tour

Exchange of biomedical data through the internet has achieved tremendous success in the recent past, with the necessity of security in every transmission. It has become indispensable to replenish secrecy in biomedical data by avoiding the access of illegitimate users. To evade such disclosure of medical data, a proposal of encryption system along with Cognitive Radio (CR) has been employed. In this paper, CR has been programmed to choose the non-availability of the primary user and by automatically detecting the presence of available spectrum in the channel using Universal Software Radio Peripheral (USRP). Then using the identified free spectrum, encrypted medical data has been transmitted and exchanged between the authenticated users in rural healthcare units. The proposed encryption technique initiates Latin Square Image Cipher (LSIC) which offers double encryption by making use of two different random keys. Then the output has been subjected to a quantum computation encryption method in which Quantum Walks (QW) serves as a key generator which is meant for its natural nonlinear chaotic behaviour. QW is followed up by the disintegration of Knight’s tour permutation process which helps in tamper proofing and authentication. Finally, shear based affine transform has been employed to avoid imperfections in the medical data. The proposed scheme curtails the insecure medical image communication in biomedical research by creating an authenticated communication link among peers. Metrics such as Number of Pixel Changing Rate (NPCR), Unified Average Changing Intensity (UACI), correlation coefficients, chi-square tests, global and local entropies were estimated and compared with the available literature results.

Author(s): Revathy K, Thenmozhi K

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