【摘要】 Chase的多授权中心的属性基加密方案由具有绝对权利的可信中心CA来发布私钥,违背了最初的分散控制目的,且因其应用于手机设备等终端存在的耗能和计算能力等问题限制了其在现实中的发展。针对上述问题,现提出了高效数据外包的基于多授权中心的属性基加密方案,该方案不再依赖中央授权方,降低了授权中心泄露用户隐私的风险,并高效而安全地对解密密文进行外包,提高了解密效率,最后对方案的正确性、安全性和效率进行了分析。更多还原

【Abstract】 Multi-authority attribute-based encryption( ABE) scheme puts forward by Chase is composed of a trusted center CA that has the absolute right to publish private key,which against the original purpose of concept of decentralized control. And because of its application in mobile device or terminals exist problems such energy and computation ability limit its development in reality. According to the above problems,the paper presents a multi-authority ABE scheme with fast outsourcing the decryption,which can issue secret keys to the user independently without a central authority and reduce the risk of leak users’ privacy by authorities. At the same time,outsourcing the ciphertext by a secure and fast manner makes the improvement of the efficiency of the decryption. Finally it presents the scheme analysis for the correctness,security and efficiency.更多还原