A Non-interactive Secure Outsourced Computation Scheme in Multi-party Cloud

Cloud computing is becoming concerned both in academia and industry and one of the most important applications is outsourced computation. A computationally weak client out sources tasks to one or more workers in cloud, and this is called outsourced computation. This paper presents an outsourced protocol based on Kamara's scheme [19], and it allows the client to outsource their computation to more than one workers while keeping privacy and correctness. Kamara proposed security definitions, while regretfully, didn't show the description of the protocol. This paper presents a specific scheme in which the workers computes directly on shares that client send to them, so the workers don't have to interactive with each other. This protocol has these advantages: the protocol keeps privacy of the original input, the workers have no interactivity with each other during the execution, the protocol keeps the threshold unchanged.