Abstract: Cloud computing is an arresting emerging computing paradigm that offers users on demand network access to a large shared pool of computing resources.How to strengthen the access control of cloud computing resources and protect sensitive data along with private key confidential against malicious servers or other external attackers,have been an important security problem.Biometric possesses notable advantage in this field,and hence this paper focused on leveraging biometric identity to achieve access control in cloud.We exploited and combined techniques of fuzzy identity based encryption(FIBE),biometric measurement,and key insulated encryption which enables augmenting the security of private key management.Specifically,we based on the idea that when every time legal user or malicious one makes the request of accessing data of his interest,and the cloud severs will update the corresponding header file which only the legal user has the ability to decrypt.

Key words: Cloud computing,Access control,Fuzzy identity based encryption,Key insulated encryption,Biometric