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Attacks on threshold signature schemes with traceable signers

Authors
Journal
Information Processing Letters
0020-0190
Publisher
Elsevier
Publication Date
Volume
71
Issue
1
Identifiers
DOI: 10.1016/s0020-0190(99)00078-2
Keywords
  • Cryptography
  • Threshold Signature
  • Group-Oriented Cryptography

Abstract

Abstract In 1998, Wang et al. proposed two new ( t, n)-threshold signature schemes with traceable signers that can withstand conspiracy attacks without attaching a secret number. However, this article will show that the proposed schemes are insecure by presenting a forgery attack on them. Any malicious attacker can generate a valid group signature for any message without knowing any secret keys of members in a group.

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