OpenPuff can only encrypt a secret file with a 256-bit algorithm and then hide it in a suspicious host file. The carrier file remains functional and provides no indication of its hidden content. The freeware supports free JPEG, MP3, FLV, PDF and EXE files as host files. Shredding the encrypted information will make it difficult to unmask, so OpenPuff is also suitable for publicly accessible files. Obviously, the tool can store an invisible watermark in a file to back up your own copyrights.
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