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IEICE TRANSACTIONS on Fundamentals

A Length-invariant Hybrid Mix

Miyako OHKUBO, Masayuki ABE

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Summary :

This paper presents a Mix-net that has the following properties; (1) it efficiently handles long plaintexts that exceed the modulus size of the underlying public-key encryption scheme as well as very short ones (length-flexibility), (2) input ciphertext length is not impacted by the number of mix-servers (length-invariance), and (3) its security in terms of anonymity can be proven in a formal way (probable security). If desired, one can add robustness so that it outputs correct results in the presence of corrupt users and servers. The security is proven in such a sense that breaking the anonymity of our Mix-net is equivalent to breaking the indistinguishability assumption of the underlying symmetric encryption scheme or the Decision Diffie-Hellman assumption.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E84-A No.4 pp.931-940
Publication Date
2001/04/01
Publicized
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DOI
Type of Manuscript
Special Section PAPER (Special Section on Fundamentals of Information and Communications)
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