Improvements of generalization of threshold signature and authenticated encryption for group communications

Recently, Wang et al. proposed a ( t, n) threshold signature scheme with ( k, l) threshold shared verification and a group-oriented authenticated encryption scheme with ( k, l) threshold shared verification. However, this article will show that both the schemes violate the requirement of the ( k, l)...

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Bibliographic Details
Published in:Information processing letters 2002-01, Vol.81 (1), p.41-45
Main Authors: Hsu, Chien-Lung, Wu, Tzong-Sun, Wu, Tzong-Chen
Format: Article
Language:English
Subjects:
Algebra
Applied sciences
Authenticated encryption
Computer science
control theory
systems
Cryptography
Data encryption
Data processing. List processing. Character string processing
Digital signatures
Exact sciences and technology
Information, signal and communications theory
Mathematical models
Mathematics
Memory organisation. Data processing
Number theory
Sciences and techniques of general use
Signal and communications theory
Software
Studies
Telecommunications and information theory
Threshold shared verification
Threshold signature
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Summary:Recently, Wang et al. proposed a ( t, n) threshold signature scheme with ( k, l) threshold shared verification and a group-oriented authenticated encryption scheme with ( k, l) threshold shared verification. However, this article will show that both the schemes violate the requirement of the ( k, l) threshold shared verification. Further, two improvements are proposed to eliminate the pointed out security leaks inherent in the original schemes.
ISSN:0020-0190
1872-6119
DOI:10.1016/S0020-0190(01)00189-2