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Title:
Steganografski algoritem za skrivanje informacij v frekvenčnem prostoru zvočnih posnetkov : diplomsko delo
Authors:
ID
Toplak, Tim
(
Author
)
ID
Lukač, Niko
(
Mentor
)
More about this mentor...
Files:
UN_Toplak_Tim_2019.pdf
(3,45 MB)
MD5: 38A13C6504C6E830AEEE1B92066E4104
PID:
20.500.12556/dkum/07901fda-36da-4359-8ff9-2b08aca77d8a
Language:
Slovenian
Work type:
Bachelor thesis/paper
Typology:
2.11 - Undergraduate Thesis
Organization:
FERI - Faculty of Electrical Engineering and Computer Science
Abstract:
V diplomskem delu predstavimo potek procesa izgubnega stiskanja digitalnega zvočnega posnetka ter steganografski postopek skrivanja informacij v frekvenčni domeni posnetka. Predstavimo kako s pomočjo spremenjene diskretne kosinusne transformacije in okenske funkcije pridobimo frekvenčni prostor. Skrivno sporočilo najprej zašifriramo s šifrirnim standardom AES in ga nato skrijemo v koeficiente spremenjene diskretne kosinusne transformacije s steganografskim algoritmom F5 ali LSB. Koeficiente na koncu stisnemo z algoritmom DEFLATE. V rezultatih preizkusimo oba steganografska algoritma pod različnimi pogoji. S kvantitativnimi kriteriji nato preverimo uspešnost algoritmov in ugotovimo kateri je boljši v določeni situaciji.
Keywords:
steganografija
,
LSB
,
F5
,
MDCT
,
zvočni posnetek
Place of publishing:
Maribor
Place of performance:
Maribor
Publisher:
[T. Toplak]
Year of publishing:
2019
Number of pages:
VIII, 27 str.
PID:
20.500.12556/DKUM-74237
UDC:
004.627.021(043.2)
COBISS.SI-ID:
22860566
NUK URN:
URN:SI:UM:DK:FNIEUPH3
Publication date in DKUM:
12.11.2019
Views:
1290
Downloads:
98
Metadata:
Categories:
KTFMB - FERI
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Licences
License:
CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:
http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:
The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:
20.08.2019
Secondary language
Language:
English
Title:
Steganographic algorithm for hiding information within the frequency domain of audio signals
Abstract:
In thesis we present a lossy compression of a digital sound recording and steganographic process of hidding information in the frequency domain of the recording. We present how we obtain frequency space by using discrete cosine transform and window function. At first we encrypt the secret message with the AES encryption standard and then hide it in the coefficients of the modified discrete cosine transformation with the steganographic algorithm F5 or LSB. The coefficients are then compressed using the DEFLATE algorithm. We test both steganographic algorithms under different conditions. With quantitative criteria we check the performance of the algorithms and find out which is better in a given situation.
Keywords:
steganography
,
LSB
,
F5
,
MDCT
,
audio recording
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