CAJ | 학술논문

聚合签密能聚合多个密文并提供批量验证，极大降低了信息传输的功耗，因此在大规模通信的多对一模式下非常适用。但是传统的聚合签密只能对密文进行部分聚合，不能最大限度地发挥出聚合功能的优越性。设计了一个密文长度固定的全聚合签密方案，实现了密文长度固定，而解密者可以通过特定解密操作将多个明文消息依次恢复出来。方案极大地提高了通信效率，签密文长度仅为｜G1｜，且与用户数量无关，同时方案满足机密性、不可伪造性和可公开验证性，非常适合在网络带宽受限环境下使用。
취합첨밀능취합다개밀문병제공비량험증，겁대강저료신식전수적공모，인차재대규모통신적다대일모식하비상괄용。단시전통적취합첨밀지능대밀문진행부분취합，불능최대한도지발휘출취합공능적우월성。설계료일개밀문장도고정적전취합첨밀방안，실현료밀문장도고정，이해밀자가이통과특정해밀조작장다개명문소식의차회복출래。방안겁대지제고료통신효솔，첨밀문장도부위｜G1｜，차여용호수량무관，동시방안만족궤밀성、불가위조성화가공개험증성，비상괄합재망락대관수한배경하사용。
Aggregate signcryption could provide shortened ciphertext and the batch verification,which could reduce the over-head greatly and was useful in the many to one communication.But the traditional schemes of aggregate signcryption only could provide part aggregation,which could not play the best of aggregation.This paper proposed an aggregate signcryption scheme with full aggregation and constant ciphertext,which could provide constant ciphertext and the receiver could recover the plain-texts successively through given operations.It proved the proposal to be more efficient,the length of ciphertext was only |G1|. What is more,the scheme is proved to be confidential and unforgeable and can provide with public verifiability at the same time,which is suited to use in the networks with constrained bandwidth.