摘要： 用户在家庭共享环境下获取文件的过程中,身份隐私信息可能被泄露。为此,提出一种基于属性加密的细粒度文件共享方案。根据用户需求,利用线性秘密共享方案制定访问策略,使用属性加密算法得到其密文,在验证用户属性是否满足访问策略后通过属性解密算法获取共享文件。实验结果表明,属性个数不超过100时,该方案的加、解密效率可以满足用户的实际需求。

关键词: 家庭共享, 访问控制, 细粒度控制, 属性加密, 线性秘密共享方案

Abstract: In the environment of home sharing,the user’s identity privacy may be leaked in the process of obtaining the file.To solve this problem,a fine-grained file sharing scheme based on attribute encryption is proposed.According to the needs of users,the linear secret sharing scheme is used to make access strategy,then the attribute based encryption algorithm is used to get the attribute based encryption ciphertext.Finally,after verifying whether the user property meets the access policy,the shared file by the property decryption algorithm is obtained.Experimental results show that,when the number of attributes is less than 100,the encryption and decryption efficiency of the proposed scheme can meet the user’s actual needs.

Key words: home sharing, access control, fine-grained control, attribute encryption, linear secret sharing scheme

中图分类号: 

• TP309