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IEICE TRANSACTIONS on Fundamentals

Security Notes on Generalization of Threshold Signature and Authenticated Encryption

Shuhong WANG, Guilin WANG, Feng BAO, Jie WANG

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Summary :

In 2000, Wang et al. proposed a (t,n) threshold signature scheme with (k,l) threshold shared verification, and a (t,n) threshold authenticated encryption scheme with (k,l) threshold shared verification. Later, Tseng et al. mounted some attacks against Wang et al.'s schemes. At the same, they also presented the improvements. In this paper, we first point out that Tseng et al.'s attacks are actually invalid due to their misunderstanding of Wang et al.'s Schemes. Then, we show that both Wang et al.'s schemes and Tseng et al.'s improvements are indeed insecure by demonstrating several effective attacks.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E87-A No.12 pp.3443-3446
Publication Date
2004/12/01
Publicized
Online ISSN
DOI
Type of Manuscript
LETTER
Category
Information Security

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