Cryptanalysis of efficient proxy signature schemes for mobile communication

Cryptanalysis of efficient proxy signature schemes for mobile communication
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移动通信高效代理签名方案的密码分析

DOI:
10.1007/s11432-010-4012-y
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发表时间:
2010-08
期刊:
SCIENCE CHINA Information Sciences
影响因子:
--
通讯作者:
Fagen Li
Fagen Li
中科院分区:
其他
文献类型:
--
作者:
Masaaki Shirase;Tsuyoshi Takagi;Fagen Li

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In a proxy signature scheme, an original signer is allowed to delegate his signing power to a designated person, called the proxy signer and the proxy signer is able to sign the messages on behalf of the original signer. Recently, Lu, Dong and Cao proposed two proxy signature schemes for mobile communication (see Sci China Ser F-Inf Sci, 2008, 51(2): 183–195). Although they proved that their schemes are secure in the random oracle model, we disprove their claim and show that their schemes are not secure.
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