TY - GEN
T1 - How to use independent secret keys for secure broadcasting of common messages
AU - Schaefer, Rafael F.
AU - Khisti, Ashish
AU - Poor, H. Vincent
N1 - Funding Information:
This work was supported in part by the German Research Foundation (DFG) under Grant WY 151/2-1 and in part by the U. S. National Science Foundation under Grant CMMI-1435778.
PY - 2015/9/28
Y1 - 2015/9/28
N2 - The broadcast channel with independent secret keys is studied. In this scenario, a common message has to be securely broadcast to two legitimate receivers in the presence of an eavesdropper. The transmitter shares with each legitimate receiver an independent secret key of arbitrary rate. These keys can either be used as one-time pads to encrypt the common message or can be interpreted as fictitious messages used as randomization resources for wiretap coding. Both approaches are discussed and the secrecy capacity is derived for various cases. Depending on the qualities of the legitimate and eavesdropper channels, either a one-time pad, wiretap coding, or a combination of both turns out to be capacity-achieving.
AB - The broadcast channel with independent secret keys is studied. In this scenario, a common message has to be securely broadcast to two legitimate receivers in the presence of an eavesdropper. The transmitter shares with each legitimate receiver an independent secret key of arbitrary rate. These keys can either be used as one-time pads to encrypt the common message or can be interpreted as fictitious messages used as randomization resources for wiretap coding. Both approaches are discussed and the secrecy capacity is derived for various cases. Depending on the qualities of the legitimate and eavesdropper channels, either a one-time pad, wiretap coding, or a combination of both turns out to be capacity-achieving.
UR - http://www.scopus.com/inward/record.url?scp=84969795533&partnerID=8YFLogxK
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U2 - 10.1109/ISIT.2015.7282800
DO - 10.1109/ISIT.2015.7282800
M3 - Conference contribution
AN - SCOPUS:84969795533
T3 - IEEE International Symposium on Information Theory - Proceedings
SP - 1971
EP - 1975
BT - Proceedings - 2015 IEEE International Symposium on Information Theory, ISIT 2015
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - IEEE International Symposium on Information Theory, ISIT 2015
Y2 - 14 June 2015 through 19 June 2015
ER -