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This paper studies the one-sided secrecy of a full-duplex two-way wiretap channel. It is motivated by a practical communication scenario, where two legitimate users communicate with each other in the presence of an external eavesdropper and only one of the users wishes to keep its message confidential from the external eavesdropper for the sake of privacy. As a general result, we establish an achievable...
This paper studies the problem of secure communication over a 2-transmitter multiple access channel (MAC) in the presence of an external eavesdropper. Two different secrecy constraints are considered: 1) individual secrecy (i.e., information leakage rate from each message to the eavesdropper is made vanishing) and 2) joint secrecy (i.e., information leakage rate from both messages to the eavesdropper...
An information exchange problem is considered where there are a number of terminal nodes, each of which transmits a broadcast-encoded version of individual information streams uplink to a network hub node that in turn transmits a network-coded version of these information streams downlink in a single transmission broadcast to all of the terminal nodes. All uplink broadcast transmissions from the terminal...
Recent research has shown that network coding can be used in content distribution systems to improve the speed of downloads and the robustness of the systems. However, such systems are very vulnerable to attacks by malicious nodes, and we need to have a signature scheme that allows nodes to check the validity of a packet without decoding. In this paper, we propose such a signature scheme for network...
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