Improvements of generalization of threshold signature and authenticated encryption for group communications |
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| Authors: | Chien-Lung HsuTzong-Sun Wu Tzong-Chen Wu |
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| Affiliation: | a Department of Information Management, National Taiwan University of Science and Technology, Taipei, Taiwan 106, Republic of China
b Department of Information Management, Huafan University, Taipei, Taiwan 223, Republic of China |
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| Abstract: | 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. |
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| Keywords: | Threshold signature Threshold shared verification Authenticated encryption |
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