Storage and computation outsourcing to cloud servers has become very popular due to the large volume of data that needs to be hosted at cloud servers and the intent to employ servers to perform computational work for clients. However, many clients are still reluctant to do so due to their concern for the confidentiality of the data. In this talk, I will present our work on developing secure protocols to outsource several kinds of computation without leaking the clients' data to the cloud servers, including outsourcing feature extraction of images, generalized matrix multiplication, etc.