標(biāo)準(zhǔn)模型下高效的異構(gòu)簽密方案
doi: 10.11999/JEIT160662 cstr: 32379.14.JEIT160662
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2.
(西北師范大學(xué)計(jì)算機(jī)科學(xué)與工程學(xué)院 蘭州 730070) ②(西北師范大學(xué)數(shù)統(tǒng)學(xué)院 蘭州 730070)
基金項(xiàng)目:
國家自然科學(xué)基金(61163038, 61562077, 61662069), 甘肅省高等學(xué)校科研項(xiàng)目(2014-A011)，西北師范大學(xué)青年教師科研能力提升計(jì)劃(NWNU-LKQN-14-7)
Efficient Heterogeneous Signcryption Scheme in the Standard Model
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2.
(College of Computer Science and Engineering, Northwest Normal University, Lanzhou 730070, China)
Funds:
The National Natural Science Foundation of China (61163038, 61562077, 61662069), Research Fund of Higher Education of Gansu Province (2014-A011), The Foundation for Excellent Young Teachers by Northwest Normal University (NWNU-LKQN-14-7)
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摘要: 異構(gòu)簽密方案能夠?yàn)椴煌踩蛑g的數(shù)據(jù)通信提供機(jī)密性和認(rèn)證性。分析現(xiàn)有的異構(gòu)簽密方案，都是在隨機(jī)預(yù)言模型下可證安全的?；诖?，該文提出一個在標(biāo)準(zhǔn)模型下從基于身份的密碼到傳統(tǒng)公鑰設(shè)施的簽密方案，利用計(jì)算Diffie-Hellman問題和判定雙線性Diffie-Hellman問題的困難性，對該方案的機(jī)密性和不可偽造性進(jìn)行了證明。通過理論和實(shí)驗(yàn)分析，該方案在計(jì)算成本和通信成本方面具有更高的效率。
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關(guān)鍵詞:
- 異構(gòu)簽密 /
- 標(biāo)準(zhǔn)模型 /
- 基于身份的密碼 /
- 傳統(tǒng)公鑰設(shè)施
Abstract: Heterogeneous signcryption scheme can ensure the confidentiality and the authentication?for data communication between different security domains. Some existing heterogeneous signcryption schemes are analyzed to be secure in the random oracle model. Based on this problem, an Identity-Based Cryptography (IBC) to Public Key Infrastructure (PKI) signcryption scheme is proposed. The proposed scheme has the confidentiality and the unforgeability under the Computational Diffie-Hellman (CDH) problem and the Decisional Bilinear Diffie-HellmanB (DBDH) problem. Through the theoretical and experimental analysis, both the computational costs and the communication overheads of the proposed scheme are more efficient. -
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