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Threshold Key-Recovery Systems for RSA

Tatsuaki OKAMOTO

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Summary :

Although threshold key-recovery systems for the discrete log based cryptosystems such as the ElGamal scheme have been proposed by Feldman and Pedersen , no (practical) threshold key-recovery system for the factoring based cryptosystems such as the RSA scheme has been proposed. This paper proposes the first (practical) threshold key-recovery systems for the factoring based cryptosystems including the RSA and Rabin schemes. Almost all of the proposed systems are unconditionally secure, since the systems utilize unconditionally secure bit-commitment protocols and unconditionally secure VSS.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E82-A No.1 pp.48-54
Publication Date
1999/01/25
Publicized
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DOI
Type of Manuscript
Special Section PAPER (Special Section on Cryptography and Information Security)
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