Hermetic Stego is a a steganography program which allows you to encrypt and hide a file of any size in one or more BMP image files, with or without the use of a stego/encryption key, so that the presence of the hidden file is undetectable , even by forensic software using statistical methods and if a user-specified stego key is used then the hidden file can be extracted only by someone, using this software, who knows that stego key.