Liquid: A detection-resistant covert timing channel based on IPD shaping

Walls, Robert J.; Kothari, Kush; Wright, Matthew

doi:10.1016/j.comnet.2010.11.007

Cited by 30 publications

(16 citation statements)

References 13 publications

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“…IPDs used for encoding the hidden message are called transmitting IPDs and IPDs used to maintain the shape of distribution are called shaping IPDs [19].…”

Section: Jitterbugmentioning

confidence: 99%

“…We implemented Liquid with sub-millisecond transmit noise with values of N s and N t and the incremental step was fixed to 0.1 ms as described in [19].…”

Section: Liquid Trafficmentioning

confidence: 99%

“…There are two types of covert timing channels: passive covert timing channels (e.g., JitterBug [14], Liquid [19]) and active covert timing channels(e.g. TRCTC [1], MBCTC [7]).…”

Section: Passive Vs Active Ctcsmentioning

confidence: 99%

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Mimic: An active covert channel that evades regularity-based detection

Kothari

Wright

2013

Computer Networks

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“…IPDs used for encoding the hidden message are called transmitting IPDs and IPDs used to maintain the shape of distribution are called shaping IPDs [19].…”

Section: Jitterbugmentioning

confidence: 99%

“…We implemented Liquid with sub-millisecond transmit noise with values of N s and N t and the incremental step was fixed to 0.1 ms as described in [19].…”

Section: Liquid Trafficmentioning

confidence: 99%

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Mimic: An active covert channel that evades regularity-based detection

Kothari

Wright

2013

Computer Networks

Self Cite

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“…It is always classified by the employed carrier; the most popular type of covert channels is network covert channels, which is based on network traffic; information is embedded by manipulating the packet timing information [1][2][3][4] or pudding some bits into the packet headers [5]. As the youngest branch of covert channels, wireless covert channel conceals the very existence of secret information by modulating it into the delivered wireless signal [6] or modifying some redundant fields of wireless communication protocols [7].…”

Section: Introductionmentioning

confidence: 99%

A Wireless Covert Channel Based on Constellation Shaping Modulation

Cao

Liu

et al. 2018

Security and Communication Networks

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Wireless covert channel is an emerging covert communication technique which conceals the very existence of secret information in wireless signal including GSM, CDMA, and LTE. The secret message bits are always modulated into artificial noise superposed with cover signal, which is then demodulated with the shared codebook at the receiver. In this paper, we first extend the traditional KS test and regularity test in covert timing channel detection into wireless covert channel, which can be used to reveal the very existence of secret data in wireless covert channel from the aspect of multiorder statistics. In order to improve the undetectability, a wireless covert channel for OFDM-based communication system based on constellation shaping modulation is proposed, which generates additional constellation points around the standard points in normal constellations. The carrier signal is then modulated with the dirty constellation and the secret message bits are represented by the selection mode of the additional constellation points; shaping modulation is employed to keep the distribution of constellation errors unchanged. Experimental results show that the proposed wireless covert channel scheme can resist various statistical detections. The communication reliability under typical interference is also proved.

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“…In [41] a network timing covert channel called liquid is proposed. In this approach, the IPDs of the covert traffic are split in two parts.…”

Section: Covert Channels In Computer Networkmentioning

confidence: 99%