Identity-Based Group Proxy Signature Scheme in the Standard Model

Gu Ke; Jia Weijia; Li Chaoliang; Chen Rongyuan

Journal of Computer Research and Development > 2013 > 50(7): 1370-1386.

Gu Ke, Jia Weijia, Li Chaoliang, Chen Rongyuan. Identity-Based Group Proxy Signature Scheme in the Standard Model[J]. Journal of Computer Research and Development, 2013, 50(7): 1370-1386.

Citation:

Gu Ke, Jia Weijia, Li Chaoliang, Chen Rongyuan. Identity-Based Group Proxy Signature Scheme in the Standard Model[J]. Journal of Computer Research and Development, 2013, 50(7): 1370-1386.

Citation:

Gu Ke, Jia Weijia, Li Chaoliang, Chen Rongyuan. Identity-Based Group Proxy Signature Scheme in the Standard Model[J]. Journal of Computer Research and Development, 2013, 50(7): 1370-1386.

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Identity-Based Group Proxy Signature Scheme in the Standard Model

1(School of Information Science and Engineering, Central South University, Changsha 410083) 2(Department of Computer Science, City University of Hong Kong, Hong Kong) 3(Department of Computer and Electronic Engineering, Hunan University of Commerce, Changsha 410205) 4(School of Computer and Communication Engineering, Changsha University of Science & Technology, Changsha 410004)

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Published Date: July 14, 2013

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Abstract

Abstract

Current group proxy signature schemes are not proved for their security in the complete security model for group proxy signature, and do not involve the concept of identity. In this paper, we show a complete security model for group proxy signature based on Boldyreva's security model. And a new identity-based group proxy signature scheme is proposed in the standard model based on the Paterson's scheme. In our security model for group proxy signature, the new scheme is proved to have the existential identity-based group proxy signature unforgerability under an adaptive chosen message attack, and have a security reduction to CDH problem. Compared with other group proxy signature schemes based on public key cryptosystem in the standard model, the new scheme is more secure and involves the concept of identity.
- group proxy signature,
- security model,
- provable security,
- identity,
- CDH problem

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