Sidiq, M., Basuki, A. I., Rosiyadi, D., Setiawan, I., Siregar, Y. H. and Sriyadi, S. (2022) “Secure protection for covid-19 infographic using blockchain and discrete cosine transform-singular value decomposition (DCT-SVD) watermarking”, JURNAL INFOTEL, 14(2), pp. 93-100. doi: 10.20895/infotel.v14i2.749.