TY - GEN
T1 - A PLL based approach to building an effective covert timing channel
AU - Chen, Changlong
AU - Song, Min
AU - Hsieh, George
AU - Xin, Chunsheng
PY - 2011
Y1 - 2011
N2 - Covert channel is used to secretly transfer information. In covert timing channels, all messages are decoded based on the arrival time of packets at the receiver side. In covert communications, synchronization between the sender and receiver plays a key role in decoding accuracy. Lost, duplicated, and out-of-order arrived packets may cause the loss of synchronization between the sender and receiver. In this study, a synchronization scheme, which is based on Phase Lock Loop (PLL), is proposed to build an effective covert timing channel. The scheme is software based and implemented in the transport layer. This is the first effort of using PLL for building a covert channel. Simulation results show that the scheme can achieve high decoding rate. Moreover, the covert timing channel built by the scheme is not affected by packet loss, duplication, and out-of-order arrival.
AB - Covert channel is used to secretly transfer information. In covert timing channels, all messages are decoded based on the arrival time of packets at the receiver side. In covert communications, synchronization between the sender and receiver plays a key role in decoding accuracy. Lost, duplicated, and out-of-order arrived packets may cause the loss of synchronization between the sender and receiver. In this study, a synchronization scheme, which is based on Phase Lock Loop (PLL), is proposed to build an effective covert timing channel. The scheme is software based and implemented in the transport layer. This is the first effort of using PLL for building a covert channel. Simulation results show that the scheme can achieve high decoding rate. Moreover, the covert timing channel built by the scheme is not affected by packet loss, duplication, and out-of-order arrival.
UR - http://www.scopus.com/inward/record.url?scp=84863136225&partnerID=8YFLogxK
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U2 - 10.1109/GLOCOM.2011.6134373
DO - 10.1109/GLOCOM.2011.6134373
M3 - Conference contribution
AN - SCOPUS:84863136225
SN - 9781424492688
T3 - GLOBECOM - IEEE Global Telecommunications Conference
BT - 2011 IEEE Global Telecommunications Conference, GLOBECOM 2011
T2 - 54th Annual IEEE Global Telecommunications Conference: "Energizing Global Communications", GLOBECOM 2011
Y2 - 5 December 2011 through 9 December 2011
ER -