↑win.rar GmbH. “RAR and WinRAR END USER LICENSE AGREEMENT (EULA)”. 《RARLAB》. The author and holder of the copyright of the software is Alexander L. Roshal. [...] Neither RAR binary code, WinRAR binary code, UnRAR source or UnRAR binary code may be used or reverse engineered to re-create the RAR compression algorithm, which is proprietary, without written permission.