A Fined-grained Cryptograph Access Control Scheme for Social Network
LI Chun-me · Jisuanji gongcheng · 2015
A secure,efficient and fined-grained access control scheme using the attribute-based encryption algorithm is proposed to solve the problem of privacy protection in social network,and an architecture is designed in social network.The proposed scheme utilizes a Linear Secret Sharing Scheme(LSSS) to construct the access policies in order to achieve flexible access structure.The technique transfers most of computing overwork involved in re-encryption to social network platform,which greatly reduces the computational cost of users while keeping the data security.The social network platform analyzes the relationship between the unauthorized users and authorized users to determine the access rights of unauthorized users.The proposed scheme can achieve the transitivity of the access rights.Finally,the performance and security of the proposed scheme are analyzed.Analysis results show that,compared with existing privacy protection schemes based on encryption technique,this scheme can improve efficiency in expression and decryption efficiency.