CAJ | 학술논문

　　针对如何构造一个在标准模型下高效的选择密文安全的单向代理重加密方案这个问题，提出了一种新的、高效的单向代理重加密方案，并且在标准模型下证明了方案在自适应攻陷模型下的选择密文安全性。所提方案与LV方案相比，在安全性和效率方面都有所提升，与WJ方案相比，在同等安全条件下，运算效率有所提高。
　　침대여하구조일개재표준모형하고효적선택밀문안전적단향대리중가밀방안저개문제，제출료일충신적、고효적단향대리중가밀방안，병차재표준모형하증명료방안재자괄응공함모형하적선택밀문안전성。소제방안여LV방안상비，재안전성화효솔방면도유소제승，여WJ방안상비，재동등안전조건하，운산효솔유소제고。
In order to construct an efficient and chosen-chiphertext secure unidirectional re-encryption scheme in the standard model, a novel and efficient unidirectional proxy re-encryption scheme was proposed, and its chosen-ciphertext security in the adaptive corruption model was proved in the standard model. Compared with LV scheme, this scheme has the advantages of both higher efficiency and stronger security. Under the same security level, this scheme has lower computational cost than that of WJ scheme.