DISCUSSION ON QUANTUM PROXY GROUP SIGNATURE SCHEME WITH χ-TYPE ENTANGLED STATE

Recently, Yin et al. (Int. J. Quantum Inform. 10 (2012) 1250041) proposed a quantum proxy group signature scheme with χ-type entangled states. The scheme combines the properties of group signature and proxy signature. The study points out that the semi-honest Trent can give the forged signature under the assumption of this scheme. And, we find that even if the three parties honestly perform the scheme, the signature still cannot be realized with high efficiency.

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QUANTUM PROXY GROUP SIGNATURE SCHEME WITH χ-TYPE ENTANGLED STATES

International Journal of Quantum Information ◽

10.1142/s0219749912500414 ◽

2012 ◽

Vol 10 (04) ◽

pp. 1250041 ◽

Cited By ~ 12

Author(s):

XUN-RU YIN ◽

WEN-PING MA ◽

WEI-YAN LIU

Keyword(s):

Initial Phase ◽

Proxy Signature ◽

Quantum Signature ◽

Unconditional Security ◽

Group Signature ◽

Entangled States ◽

Utilization Rate ◽

Signature Scheme ◽

State Sequence ◽

General Quantum

A quantum proxy group signature scheme is proposed with χ-type entangled states. Our scheme combines the properties of group signature and proxy signature. Moreover, the particles in the χ-type state sequence are used to distribute proxy warrants and quantum keys in the initial phase, and then used for quantum signature. Therefore it increases the utilization rate of quantum resources compared with the general quantum signature scheme. Finally, the unconditional security of our scheme is also analyzed.

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Proxy group signature: A new anonymous proxy signature scheme

2008 International Conference on Machine Learning and Cybernetics ◽

10.1109/icmlc.2008.4620618 ◽

2008 ◽

Author(s):

Ke-Li Wu ◽

Jing Zou ◽

Xiang-He Wei ◽

Feng-Yu Liu

Keyword(s):

Proxy Signature ◽

Group Signature ◽

Signature Scheme

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Group–Proxy Signature Scheme: A Novel Solution to Electronic Cash

Journal of Intelligent Systems ◽

10.1515/jisys-2012-0024 ◽

2013 ◽

Vol 22 (2) ◽

pp. 95-110 ◽

Cited By ~ 2

Author(s):

Haiyong Bao ◽

Zhenfu Cao

Keyword(s):

Electronic Commerce ◽

Group Size ◽

Proxy Signature ◽

Space Time ◽

Group Signature ◽

Signature Scheme ◽

Electronic Cash ◽

Cryptographic Primitives ◽

The Future ◽

First Time

AbstractProxy signature and group signature are two basic cryptographic primitives. Due to their valuable characteristics, many schemes have been put forward independently and they have been applied in many practical scenarios up to the present. However, with the development of electronic commerce, many special requirements come into being. In this article, we put forward the concept of group–proxy signature, which integrates the merits of proxy signature and group signature for the first time. We also demonstrate how to apply our scheme to construct an electronic cash system. The space, time, and communication complexities of the relevant parameters and processing procedures are independent of group size. Our demonstration of the concrete group–proxy signature scheme shows that the concepts brought forward by us are sure to elicit much consideration in the future.

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Further Study on System Optimization in Proxy Signature

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.20-23.518 ◽

2010 ◽

Vol 20-23 ◽

pp. 518-524

Author(s):

Xuan Wu Zhou

Keyword(s):

Elliptic Curves ◽

High Efficiency ◽

Polynomial Algorithm ◽

Optimization Algorithms ◽

Discrete Logarithm ◽

System Optimization ◽

Proxy Signature ◽

Signature Scheme ◽

Effective Protection ◽

Integrated Environment

In the paper, we analyzed optimization algorithms for proxy signature and presented an optimized proxy signature scheme based on discrete logarithm cryptosystem. In the scheme, the signature entrusting parameters are generated with private keys of original signer and the proxy signer; dishonest proxy signer and outer adversaries can not attack secret parameters or other proxy signature with feasible polynomial algorithm, thus the scheme provides effective protection for the secrecy of proxy signers and also renders reasonable supervision on the proxy right. By utilizing random algorithms in signature generating, the scheme avoids the relevance between different parameters and proxy signature from the same signer. Then we presented an improved proxy signature scheme based on ECC (Elliptic Curves Cryptosystem), the scheme well satisfies the requirement of proxy signature and also makes full use of the superiority of ECC, such as high efficiency and security. Therefore, the scheme proves to be applicable to integrated environment with limited system resources.

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