雾计算中支持计算外包的微型属性加密方案

密文策略属性加密为基于云存储的物联网系统提供了一对多的访问控制,然而现有方案中存在开销大、粒度粗等问题.基于此,结合雾计算技术提出了一种支持计算外包的微型属性加密方案.该方案缩短了密钥与密文的长度,减少了客户端的存储开销;将部分计算转载到雾节点,提高了加解密效率;具有更加丰富的策略表达能力,并且可以快速验证外包解密的正...

A compact attribute-based encryption scheme supporting computing outsourcing in fog computing

Ciphertext-policy attribute-based encryption provides one-to-many access control for IoT systems based on cloud storage. However, there are some problems such as high cost and coarse granularity in the existing scheme. Therefore, a compact attribute-based encryption scheme supporting computing outsourcing with fog computing technology is proposed. It shortens the length of the keys and ciphertexts to reduce the storage cost of the client, transfers part of the computing to fog nodes to improve encryption and decryption efficiency, has more abundant policy expression ability, and can quickly verify the correctness of outsourcing decryption. The scheme is proved secure against indistinguishably chosen-ciphertext attack. Furthermore, performance analysis shows that our proposal can provide efficient access control for data storage when terminal device is limited in fog computing.