Ul Haq, H.B., Abbas, A., Khan, R.A., Akhtar, A.N., Akram, W., Nawaz, S., Mayo, F.I. and Bhatti, A.I. 2022. E-Healthcare Using Block Chain Technology and Cryptographic Techniques: A Review. Pakistan Journal of Engineering and Technology. 5, 4 (Dec. 2022), 21–28. DOI:https://doi.org/10.51846/vol5iss4pp21-28.