— One of the works that are protected in the form of digital goods , such as software and multimedia products such as text , music , images , and digital video . So far, doubling over the digital products done freely . This will cause the negative side is if there is no copyright protection against the spread of digital files , the digital files will be very easily recognized ownership by other parties . One way to protect copyright is to insert information into the data with watermarking techniques . Watermarking technique is the process of adding a permanent identification code into digital data or can be referred to as digital watermarking . The identification code can be text , images , sounds , or video . The method used for embedding watermark in digital watermarking applications are methods End Of File ( EOF ) . EOF method works by inserting information or messages into a file , in which the information or message is inserted at the end of the file. Keywords— Steganography, End Of File (EOF), Digital Watermarking.