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Information Theoretic Approach to Privacy for Multi-Party Protocols
Takashi SATOH Kaoru KUROSAWA
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1997/01/25
Print ISSN: 0916-8508
Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security)
multi-terminal information theory, privacy, multiparty protocol,
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In this paper, we show an entropy-based approach to the privacy of multi-party protocols. First, we formulate the amount of leaked information by using mutual information for a two-party case. This is a better measure for some situations than the combinatorial measure known so far. Next, we apply multi-terminal information theoty to more than two parties and give the first formulation of the leaked information for more than two parties.