Computer Science – Information Theory
Scientific paper
2009-06-15
IEICE Trans. Fundamentals, vol. 93, no. 9, pp. 1650-1659, September 2010
Computer Science
Information Theory
10 pages, no figure, A part of this paper will be presented at 2009 IEEE International Symposium on Information Theory in Seou
Scientific paper
10.1587/transfun.E93.A.1650
The privacy amplification is a technique to distill a secret key from a random variable by a function so that the distilled key and eavesdropper's random variable are statistically independent. There are three kinds of security criteria for the key distilled by the privacy amplification: the normalized divergence criterion, which is also known as the weak security criterion, the variational distance criterion, and the divergence criterion, which is also known as the strong security criterion. As a technique to distill a secret key, it is known that the encoder of a Slepian-Wolf (the source coding with full side-information at the decoder) code can be used as a function for the privacy amplification if we employ the weak security criterion. In this paper, we show that the encoder of a Slepian-Wolf code cannot be used as a function for the privacy amplification if we employ the criteria other than the weak one.
Matsumoto Ryutaroh
Uyematsu Tomohiko
Watanabe Shun
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