Desarrollo de una herramienta de uso didáctico que permita esconder información encriptada dentro de una imagen con formato JPEG empleando esteganografía

Abstract

The present work consists in the development of a didactic tool capable of hiding encrypted information within an image using steganography and developed in Matlab. The application will use the Advanced Encryption Standard (AES) algorithms with 128-bit key for encryption and least significant bit (LSB) as a steganographic method. The tool consists of 3 main modules: encrypt and hide a message entered by keyboard, encrypt and hide a text file with a .txt extension and decrypt to obtain the hidden information. In the two main modules you can enter the image, the message by keyboard or the text file, place the key for encryption and the bit where you want to hide the information. Also, in these modules you have the option to view and edit the original and resulting images in brightness or zoom with the option to view their histogram. In the third module the image stego, the key and the bit where the information to hide it is hidden will be entered. This application will allow a practical and didactic way to verify the usefulness of steganographic and cryptographic techniques for the subject of Network Security.