| 摘要: |
| 提出了一种高效的无随机预言机的可验证加密签名方案.该方案使用近来出现的Gentry 签名进行构造,并在标准模型下严格证明其安全性.与同类方案相比,该方案构造简单,有较短的公钥尺寸、较低的计算代价以及较紧的安全归约.它是一个真正实践的无随机预言机的可验证加密签名方案,可以用于实际的在线合同签署协议.此外,方案的证明依赖于强Diffie-Hellman 假设,也有其独立的价值. |
| 关键词: 数字签名 可验证加密签名 可证明安全 随机预言机模型 |
| DOI： |
| 分类号: |
| 基金项目:Supported by the National Natural Science Foundation of China under Grant No.60673075 (国家自然科学基金); the Doctoral Program Foundation of Chinese Ministry of Education under Grant No.20050614018 (国家教育部高等学校博士学科点专项科研基金) |
|
| Efficient Verifiably Encrypted Signature Scheme without Random Oracles |
|
YANG Hao-Miao,SUN Shi-Xin,XU Ji-You
|
| Abstract: |
| This paper proposes an efficient verifiably encrypted signature scheme without random oracles. The
scheme is constructed from the recent Gentry signature and can be rigorously proven to be secure in the standardmodel. The scheme has several advantages over previous systems such as, shorter public keys, lower computationoverhead, and a tighter security reduction, therefore, it is a truly practical verifiably encrypted signature withoutrandom oracles, which can be used in online contract signing protocols. Additionally, the proof of our scheme,which depends on the Strong Diffie-Hellman assumption, may be of independent interest. |
| Key words: digital signature verifiably encrypted signature provable security random oracle model |
