CAJ | 학술논문

对两种新提出的无证书混合签密方案进行密码学分析，指出它们各自存在的正确性和安全性缺陷，进而提出一种更加安全和高效的无证书混合签密方案。通过引入vBNN-IBS签名算法，从而避免使用幂指数运算，进一步降低新方案的计算开销。在随机预言机模型下，新方案被证明是安全的，满足不可伪造性和机密性。对比分析表明，新方案在确保强安全性的同时具有更低的计算开销。
대량충신제출적무증서혼합첨밀방안진행밀마학분석，지출타문각자존재적정학성화안전성결함，진이제출일충경가안전화고효적무증서혼합첨밀방안。통과인입vBNN-IBS첨명산법，종이피면사용멱지수운산，진일보강저신방안적계산개소。재수궤예언궤모형하，신방안피증명시안전적，만족불가위조성화궤밀성。대비분석표명，신방안재학보강안전성적동시구유경저적계산개소。
Cryptanalysis is carried out on two new certificateless hybrid signcryption schemes , the correctness and security flaws of their own respectively are pointed out in the paper .Then we propose a more secure and efficient certificateless hybrid signcryption scheme .The use of exponential operations are eluded in new signcryption scheme through introducing the vBNN -IBS signature algorithm , and this also further reduces the computational costs of the new scheme .In random oracle model , the new scheme has been verified safe enough to achieve the un-forgeability and confidentiality .Comparative analysis shows that the new scheme has strong security with low computation overhead .