CAJ | 학술논문

目前自适应安全的多授权机构基于属性的加密（Attribute-Based Encryption ，ABE）方案都是在合数阶群上构造，针对其计算开销较大的问题，利用对偶配对向量空间技术，在素数阶群上构造了一种支持单调的访问结构且自适应安全的多授权机构密文策略 ABE（Multi-Authority Ciphertext Policy ABE ，MA-CP-ABE）方案。在标准模型下将该方案的安全性归约到判定性线性假设。性能分析表明，该方案在达到自适应安全的同时，具有更高的计算效率。
목전자괄응안전적다수권궤구기우속성적가밀（Attribute-Based Encryption ，ABE）방안도시재합수계군상구조，침대기계산개소교대적문제，이용대우배대향량공간기술，재소수계군상구조료일충지지단조적방문결구차자괄응안전적다수권궤구밀문책략 ABE（Multi-Authority Ciphertext Policy ABE ，MA-CP-ABE）방안。재표준모형하장해방안적안전성귀약도판정성선성가설。성능분석표명，해방안재체도자괄응안전적동시，구유경고적계산효솔。
Previous adaptively secure multi-authority attribute-based encryption (ABE)schemes suffered from superfluous computation overhead on composite order groups .To tackle this problem ,an adaptively secure multi-authority ciphertext-policy ABE (MA-CP-ABE)scheme on prime order groups was proposed when a dual pairing vector space approach was employed .The pro-posed scheme supports any monotone access structure ,and is proven adaptively secure from the decisional linear assumption in the standard model .Performance analysis indicates that our scheme is more efficient while achieving the adaptive security .