Media type: Electronic Conference Proceeding Title: Conceal secret letter using 2D wavelet packet Contributor: AL-Dabbas, Maisa’a A. K.; Al-Khalssi, Shatha H. J. Published: Author(s), 2019 Published in: AIP Conference Proceedings (2019) Extent: Language: Not determined DOI: 10.1063/1.5095092 ISSN: 0094-243X Origination: Footnote: