Thesis Details

Digitální textová steganografie

Bachelor's Thesis Student: Pouč Petr Academic Year: 2021/2022 Supervisor: Strnadel Josef, Ing., Ph.D.
English title
Digital Text Steganography

This bachelor's thesis aims to identify the characteristics of a field of science called steganography, especially digital text steganography. The purpose of this study is to become acquainted with this field and analyze some of the methods of digital text steganography in a detail. Another objective of this bachelor's thesis was to choose and implement suitable methods for information hiding in text data. The chosen methods that were implemented were finally verified by automated tests and analyzed in detail. Based on the results of this research, it can be concluded that secret messages hidden by these methods can be very difficult to spot. The final statistics were processed into a comprehensible table, in which we can see, that perceptibility of some methods got over 95 % and success rate of hiding short messages reached almost 100 %. Based on the results of this study, we can choose a suitable method for the most reliable information hiding in the text file, so we can prevent unwanted decryption of a hidden message.


Steganography, information hiding, text file moodification, security, linguistics, secret communication, confidental data

Degree Programme
defended, grade B
14 June 2022
Hanáček Petr, doc. Dr. Ing. (DITS FIT BUT), předseda
Malinka Kamil, Mgr., Ph.D. (DITS FIT BUT), člen
Milet Tomáš, Ing., Ph.D. (DCGM FIT BUT), člen
Ryšavý Ondřej, doc. Ing., Ph.D. (DIFS FIT BUT), člen
Strnadel Josef, Ing., Ph.D. (DCSY FIT BUT), člen
POUČ, Petr. Digitální textová steganografie. Brno, 2022. Bachelor's Thesis. Brno University of Technology, Faculty of Information Technology. 2022-06-14. Supervised by Strnadel Josef. Available from:
    author = "Petr Pou\v{c}",
    type = "Bachelor's thesis",
    title = "Digit\'{a}ln\'{i} textov\'{a} steganografie",
    school = "Brno University of Technology, Faculty of Information Technology",
    year = 2022,
    location = "Brno, CZ",
    language = "czech",
    url = ""
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