Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/69211
標題: On the security of generalization of threshold signature and authenticated encryption
作者: Tseng, Y.M.
Jan, J.K.
Chien, H.Y.
關鍵字: cryptography;threshold signature;group-oriented cryptography;authenticated encryption;discrete logarithms;shared verification;digital signature;scheme
Project: Ieice Transactions on Fundamentals of Electronics Communications and Computer Sciences
期刊/報告no:: Ieice Transactions on Fundamentals of Electronics Communications and Computer Sciences, Volume E84A, Issue 10, Page(s) 2606-2609.
摘要: 
In 2000, Wang et al. proposed a new (t, n) threshold signature scheme with (k, l) threshold shared verification. Meanwhile, integrating the idea of message recovery, the), also proposed a (t, n) threshold authenticated encryption scheme with (k, l) threshold shared verification. However, this article will show that both proposed schemes are insecure, because any malicious attacker can obtain the group secret keys from two valid threshold signatures. Thus, the attacker may solely forge or verify a threshold signature. An improvement to overcome the attacks is proposed.
URI: http://hdl.handle.net/11455/69211
ISSN: 0916-8508
Appears in Collections:期刊論文

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