The proliferation of cloud computing has made it feasible for users to access and update their personal data from any location using a mobile device. This escalates the already serious data security issue in mobile cloud, which stymies its progress. Much research has been done to improve cloud safety. Nevertheless, due to the restricted computational resources and power of mobile devices, they are not suited for clouds on mobile devices. Cloud applications on mobile devices have a tremendous demand for solutions with reduced computational overhead. For this reason, we propose a Lightweight Data-Sharing-SchemeLDSS for mobile cloud computing. It takes use of CPABE, a standard cloud-based access control method, but modifies the tree structure of that method so that it may be utilized in mobile cloud settings. With CPABE, the access control tree transformation is a computationally costly operation, however with LDSS, this task is offloaded to external proxy servers.