Packet flow side channel
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United States of America Patent
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Feb 4, 2014
Grant Date -
Mar 24, 2011
app pub date -
Sep 30, 2010
filing date -
Nov 3, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
A packet flow side channel encoder and decoder embeds and extracts a side channel communication in an overt communication data stream transmitted over a network. The encoder selects more than one group of related packets being transmitted on the network, relates a packet of one group to a packet of another group to form a pair of packets; and delays the timing of at least one packet from each pair of packets The decoder determines inter-packet delays that are the difference in timing between two packets in a pair of packets; determines at least one inter-packet delay difference between two or more determined inter-packet delays; and extracts a bit using the at least one interpacket delay difference.
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