https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/11175641Edit ImageSaveSaveEditCropCustom TextSecurity motivational poster (1950-1969) chromolithograph by NSA. Original public domain image from Wikipedia. Digitally enhanced by rawpixel.Original public domain image from Wikimedia CommonsMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGTIFFSmall JPEG 936 x 1200 px | 300 dpiLarge JPEG 2268 x 2908 px | 300 dpiTIFF 2268 x 2908 px | 300 dpi | 37.77 MBFree DownloadSecurity motivational poster (1950-1969) chromolithograph by NSA. Original public domain image from Wikipedia. Digitally enhanced by rawpixel.More