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| 标准模型下可证安全的门限签名方案 | |
| 引用本文： | 乔丹丹,刘振华,王保仓,刘雪.标准模型下可证安全的门限签名方案[J].信息安全与通信保密,2012(7):117-119. |
| 作者姓名： | 乔丹丹 刘振华 王保仓 刘雪 |
| 作者单位： | 1. 西安电子科技大学数学系,陕西西安,710071 2. 西安电子科技大学数学系,陕西西安710071 电子科技大学网络与数据安全四川省重点实验室,四川成都611731 3. 西安电子科技大学ISN国家重点实验室,陕西西安,710071 |
| 基金项目： | 基金项目:本文受国家自然科学基金项目资助 |
| 摘 要： | 门限签名能够分散签名权力,比普通单人签名具有更高的安全性。目前大多数门限签名方案都存在密钥托管的问题。针对一种新的基于身份的门限签名方案存在的安全性问题,利用椭圆曲线上的双线性对,文中提出了一个改进的方案。新方案由私钥生成中心和签名成员合作生成密钥,由此防止了PKG伪造签名,较好地解决了密钥托管的问题。在标准模型下对该方案进行了安全性证明,表明该方案是不可伪造的和健壮的。与已有的门限签名方案相比,安全性有较大的提高,效率没有明显的降低。 |
| 关 键 词： | 基于身份 门限签名 无随机预言 可信中心 双线性对 |
A Provably Secure Threshold Signature Scheme Under Standard Model |
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| QIAO Dan-dan,LIU Zhen-hua,WANG Bao-eang,LIU Xue.A Provably Secure Threshold Signature Scheme Under Standard Model[J].China Information Security,2012(7):117-119. | |
| Authors: | QIAO Dan-dan LIU Zhen-hua WANG Bao-eang LIU Xue |
| Affiliation: | 1Department of Mathematics, Xidian University, Xi＇an Shaanxi 710071, China; 2Siehuan Provincial Network and Data Security Key Laboratory, University of Electronic Science and Technology of China, Chengdu Sichuan 611731, China; 3ISN Key Laboratory, XidianUniversity, Xi＇anShaanxi710071, China) |
| Abstract: | Threshold signature could distribute the power of signature, and therefore is more secure than normal single signature. Most threshold signatures have the key-escrow proplem. For the security problem in a novel identity-based threshold signature, a modified threshold signature scheme by using bilinear parings is proposed. In this scheme, the private key generator cooperates with signing users in generating key, thus to prevent PKG from forging signatures. Theoretical analysis shows that the new scheme has the properties of robustness and unforgeability, and compared with the previous scheme, it is safer and with no obvious decrease in efficiency. |
| Keywords: | identity-based signature threshold signature without random oracles trusted party bilinear parings |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |
