Attribute Based User Control Access for Cloud Storage Data

摘要

Online documents provide very convenient ways for individuals to store and share various data including personal profile, business documents and etc on remote online data servers. Cloud Computing, regarded as the future IT architecture, and even promises to provide unlimited and elastic computing resources to cloud users in a very costeffective way. Information security is basically a critical issue for remote data storage in cloud environment. On one side, disclosure of sensitive information, an example would be business records, stored on remote data servers ought to be strictly protected before users to utilize the data services. Traditional data access control mechanisms often should not set up appropriate security mechanism to sensitive data among multiple users. An untrusted storage cloud server is permitted to learn the content of sensitive data and doesn’t enforce data access policies. To maintain data confidential owner need to encrypt data before upload to the cloud. User access is granted by possessing the data decryption secret key. In this proposed approach an improved attribute based document encryption and decryption is provided for multiple users in cloud environment.