@article{IJAMCS_2022_32_1_a10, author = {El-Douh, Ahmed Abdel-Rahim and Lu, Song Feng and Elkouny, Abdelatif A. and Amein, A.S.}, title = {Hybrid cryptography with a one-time stamp to secure contact tracing for {COVID-19} infection}, journal = {International Journal of Applied Mathematics and Computer Science}, pages = {139--146}, publisher = {mathdoc}, volume = {32}, number = {1}, year = {2022}, language = {en}, url = {http://geodesic.mathdoc.fr/item/IJAMCS_2022_32_1_a10/} }