云计算中支持有效用户撤销的多授权方基于属性加密方案

Multi-authority attribute-based encryption with efficient user revocation in cloud computing

提出了一个支持有效用户撤销的多授权方基于属性加密方案,每个用户都拥有一个"混合解密密钥"用于实现有效的用户撤销。与现有的方案相比,该方案在进行用户撤销时更加有效。除此以外,该方案还能实现用户的动态权限管理,在云端进行部分数据外包加密,密文部分解密,在期限过后已分享的数据可自我销毁。

An efficient user revocable multi-authority ABE scheme was proposed, a ＂hybrid decryption key＂ for each user isused to achieve efficient user revocation. Comparing with the existing schemes, this scheme is more effective in user revocation. In addition, the scheme can also achieve user dynamic privileges management, partial data outsource encryption and ciphertext partially decrypted in the cloud server and shared data self-destruction after expiration.