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The article presents a complex system of two-way authentication operating in IEEE 802.11 wireless networks and making use of the network steganography methods. System assumptions, its general working principle and purpose of additional authentication performed in a covert manner are demonstrated herein. The steganography methods are described here in detail: a method using Probe Request frames, a...
Steganografia to dziedzina zajmująca się ukrywaniem dodatkowych informacji w danych, które są przesyłane przez kanał telekomunikacyjny w sposób jawny. Pierwsze algorytmy steganograficzne polegały na ukrywaniu informacji w treściach multimedialnych, takich jak wideo, sygnał audio, obrazy lub tekst. Kolejnym etapem były techniki steganografii sieciowej, które wykorzystują protokoły sieciowe do skrytej...
The article describes and compares the effectiveness of two steganographic methods dedicated for speech signal processing. The first method is based on the change in the drift of a phase angle (Drift Correction Modulation, DCM), whereas the second uses spectral amplitude correction (Pattern Magnitude Modulation, PMM). The results of experiments corroborating the robustness of the methods against degrading...
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