Detecting and Extracting Hidden Information from Stego-Images Based on JPG File on StegoMagic

Steganography is a technique used for concealing information by embedding messages or data into other data. However, problems can arise when this technique is used to steal confidential information, for unlawful purposes such as spying, terrorist attacks, and so on. Moreover, when the information is hidden, serious problems are caused if the evidence is not obtained. Therefore, we propose a detection method, based on StegoMagic-a steganography tool-that can be used on hidden information within a JPG file. We also propose an extraction method for the hidden information.