Steganographic File System Based on Jpeg Files

Abstract

A steganographic system provides a hidden communication channel in background of a public channel. The existence of the hidden channel must remain secret, i.e. the adversary cannot decide whether the public channel contains any covert information or not. The public channel that is used in construction of a steganographic system can often be embedded in a static file (medium), that is called a carrier (if the steganographic information is present). Most of the current research focuses on a single medium. The most suitable types of media, such as images or music files, contain a lot of redundancy. Small changes in the redundant parts are not easily detected. However, new methods for the detection of this information are developed along with the new algorithms for embedding the hidden information. Our work describes a new steganographic system design, where the hidden information is spread among many static images in a form of a virtual steganographic filesystem. We note that the implementation of the system must also take into account “steganographic side-channels”, i.e., some information channels that are present in the operating system (in our case Linux, and Android) that leak information about the presence of the hidden channel.

On Data Hiding Using Domain Specific Hierarchical Data Structure Svdag for Geometry Representation of Voxelized Threedimensional Scenes

“…To name only a few examples, with the rise of computers possibility of the use of secondary storage systems, their changeable media and file systems were examined for the possibility to hide information based on the hardware and software features [8][9] [10]. Another way how to hide information which is connected to the use of computers is the possibility to hide information into pictures stored in JPEG file format [11] [12]. Specific algorithms were created in relation to rise of smartphones and their operating systems including iOS and Android.…”

Presenting Risks Introduced by Android Application Permissions in a User-Friendly Way

“…Securing an open platform requires robust security architecture and precisely designed security system. Even though it is possible to provide security at the application level (by means of cryptography or steganography [2], [3]), this does not provide protection against the security leaks at the level of operating system modules. But multi-layer architecture of Android provides necessary flexibility in development and also certain level of protection.…”