Frontiers of Computer Science CN 10-1014/TP https://doi.org/10.1007/s11704-019-9120-2 ISSN 2095-2228 RESEARCH ARTICLE A Post-processing Method for True Random Number Generators based on Hyperchaos with Applications in Audio-based Generators Je Sen TEH 1 , Weijian TENG 2 , Azman SAMSUDIN 1 , Jiageng CHEN 3 1 School of Computer Sciences, Universiti Sains Malaysia, Penang 11800, Malaysia 2 School of Engineering and Technology, Inti International College Penang, Penang 11900, Malaysia 3 School of Computer, Central China Normal University, Wuhan 430079, China Front. Comput. Sci., Just Accepted Manuscript • 10.1007/s11704-019-9120-2 http://journal.hep.com.cn on September 4, 2019 © Higher Education Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019 Just Accepted This is a “Just Accepted” manuscript, which has been examined by the peer-review process and has been accepted for publication. A “Just Accepted” manuscript is published online shortly after its acceptance, which is prior to technical editing and formatting and author proofing. Higher Education Press (HEP) provides “Just Accepted” as an optional and free service which allows authors to make their results available to the research community as soon as possible after acceptance. After a manuscript has been technically edited and formatted, it will be removed from the “Just Accepted” Web site and published as an Online First article. Please note that technical editing may introduce minor changes to the manuscript text and/or graphics which may affect the content, and all legal disclaimers that apply to the journal pertain. In no event shall HEP be held responsible for errors or consequences arising from the use of any information contained in these “Just Accepted” manuscripts. To cite this manuscript please use its Digital Object Identifier (DOI(r)), which is identical for all formats of publication.”