Securing Cover-File Without Limitation of Hidden Data Size Using Computation Between Cryptography and Steganography

摘要

The rapid development of multimedia and internet allows for wide distribution of digital media data. It becomes much easier to edit, modify and duplicate digital information. In additional, digital document is also easy to copy and distribute, therefore it may face many threats. It became necessary to find an appropriate protection due to the significance, accuracy and sensitivity of the information. Nowadays, protection system can be classified into more specific as hiding information and encryption information or a combination between them. The strength of the combination between hiding and encryption science is due to the non-existence of standard algorithms to be used in (hiding and encryption) secret messages. Also there is randomness in hiding methods such as combining several media (covers) with different methods to pass a secret message. Furthermore, there is no formal method to be followed to discover a hidden data. In this paper, a new information hiding system is presented. The aim of the proposed system is to hide information (data file) in an execution file (EXE).The new proposed system is able to embed an information in an execution file and also able to retract the hidden file from the execution file. Meanwhile, since the cover file might be used to identify hiding information, the proposed system considers overcoming this dilemma by using the execution file as a cover file.