Cloud computing become more popular over the world. It provides services over the Internet. Cryptographic techniques provides protection for data of users in public cloud, but there are some issues, such as secure data group sharing and fine-grained access control of time-sensitive data. In this paper, we proposed a secure corporate cloud based data sharing system for employees in which multiple companies can use cloud document sharing system. In our system we proposed a novel technique of encryption in which we are combining broad cast encryption technique and Attribute based encryption technique with each other. Along with the security of the system we proposed auto leakage control system to prevent the document leakage before release time. Here, we are using identity based data group sharing scheme, in which data owner can send encrypted message over a group of receivers at one time by specifying these receivers’ identities.
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