On the Security of an Identity-Based Proxy Signature Scheme in the Standard Model

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概要

• 論文の詳細を見る

• Observing the security of existing identity-based proxy signature schemes was proven in the random oracle model, Cao et al. proposed the first direct construction of identity-based proxy signature secure in the standard model by making use of the identity-based signature due to Paterson and Schuldt. They also provided a security proof to show their construction is secure against forgery attacks without resorting to the random oracles. Unfortunately, in this letter, we demonstrate that their scheme is vulnerable to insider attacks. Specifically, after a private-key extraction query, an adversary, behaving as a malicious original signer or a malicious proxy signer, is able to violate the unforgeability of the scheme.

• The Institute of Electronics, Information and Communication Engineersの論文

著者

• Yu Yong

  School Of Computer Science And Engineering University Of Electronic Science And Technology Of China

• SUN Ying

  Sichuan Electric Power Research Institute

• ZHANG Xiaosong

  School of Computer Science and Engineering, University of Electronic Science and Technology of China

• CHAI Jiwen

  Sichuan Electric Power Research Institute

関連論文

• Identity-Based Authenticated Key Agreement Protocols without Bilinear Pairings
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• Further Analysis of a Practical Hierarchical Identity-Based Encryption Scheme
• Security Analysis of a Distributed Reprogramming Protocol for Wireless Sensor Networks
• On the Security of an Identity-Based Proxy Signature Scheme in the Standard Model

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