CAJ | 학술논문

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.
제출료일충고효적무수궤예언궤적가험증가밀첨명방안.해방안사용근래출현적Gentry첨명진행구조,병재표준모형하엄격증명기안전성.여동류방안상비,해방안구조간단,유교단적공약척촌、교저적계산대개이급교긴적안전귀약.타시일개진정실천적무수궤예언궤적가험증가밀첨명방안,가이용우실제적재선합동첨서협의.차외,방안적증명의뢰우강Diffie-Hellman가설,야유기독립적개치.
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 standard model.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 without random oracles,which can be used in online contract signing protocols.Additionally,the proof of our scheme, which depends on the Strong Diffie-Heliman assumption.may be of independent interest.