A. Kuznetsov, K. Shekhanin, A. Kolhatin, V. Zvieriev, K. Kuznetsova. Data Hiding in a File System Structure. In.: ISCI’2018: Information Security in Critical Infrastructures. Collective monograph. Edited by Ivan D. Gorbenko and Alexandr A. Kuznetsov, ASC Academic Publishing, USA, 2018, pp. 324-342. – ISBN: 978-0-9989826-5-6 (Paperback).

In this paper, the methods of steganography hiding of information in a file system structure is investigated. Namely, the structure of the FAT file system (File Allocation Table) and methods of hiding information messages, which are based on repositioning separate clusters of cover files. A new method is proposed that, unlike the known ones, changes the order of alternation of clusters in each cover file, which allows to further hide a certain informational message, that is, to increase the capacity of the hidden channel. The proposed method is implemented programmatically, the results of experimental researches confirmed the adequacy of the theoretical conclusions and recommendations.