Hiding Data in OFDM Symbols of IEEE 802.11 Networks

Details Hiding Data in OFDM Symbols of IEEE 802.11 Networks Hiding Data in OFDM Symbols of IEEE 802.11 Networks

2010-06-02

arxiv.org/abs/1006.0495v1

Computer Science

Cryptography and Security

6 pages, 8 figures, 1 table

Scientific paper

This paper presents a new steganographic method called WiPad (Wireless Padding). It is based on the insertion of hidden data into the padding of frames at the physical layer of WLANs (Wireless Local Area Networks). A performance analysis based on a Markov model, previously introduced and validated by the authors in [10], is provided for the method in relation to the IEEE 802.11 a/g standards. Its results prove that maximum steganographic bandwidth for WiPad is as high as 1.1 Mbit/s for data frames and 0.44 Mbit/s for acknowledgment (ACK) frames. To the authors' best knowledge this is the most capacious of all the known steganographic network channels.

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