CAJ | 학술논문

签密能够同时完成公钥加密和数字签名两项任务,实现消息既保密又认证的双重功能.同时,签密的计算量和通信代价都要低于传统的保密认证方法一先签名后加密.鉴于签密重要性和无证书密码系统的优点,首次提出了一个可证安全的无证书并行签密方案.该签密方案建立在已分别被证明是安全的无证书加密方案和签名方案基础之上.分析显示该签密方案满足诸如不可否认性、可公开验证性和前向安全性等安全性质.
첨밀능구동시완성공약가밀화수자첨명량항임무,실현소식기보밀우인증적쌍중공능.동시,첨밀적계산량화통신대개도요저우전통적보밀인증방법일선첨명후가밀.감우첨밀중요성화무증서밀마계통적우점,수차제출료일개가증안전적무증서병행첨밀방안.해첨밀방안건립재이분별피증명시안전적무증서가밀방안화첨명방안기출지상.분석현시해첨밀방안만족제여불가부인성、가공개험증성화전향안전성등안전성질.
Signcryption schemes can achieve confidentiality and authentication simultaneously by combining public-key encryption and digital signatures,at lower computational costs and communication overheads than the traditional signature-then-encryption approach.Due to the importance of signcryption schemes and the advantage of certificateless cryptography,a provable security cer-tificateless parallel signcryption scheme is put foword for the first time.It is based on a certificateless encryption scheme and a certificateless signature scheme,which have been proved secure respectively.The analysis shows that the signcryption scheme satis-fies the security requirements such as non-repudiation,public verifiability and forward security for a signcryption scheme.