What we do:
Secure delegated quantum computing allows a computationally weak client to outsource an arbitrary quantum computation to an untrusted quantum server in a privacy-preserving manner. We have developed several schemes using quantum communications between client and server to achieve information-theoretic security. Recently we have also shown how the same functionality with a purely classical client can be also obtained but reducing the security to being post-quantum computationally secure. The assumptions are necessary as we provided strong evidence that such protocol could not provide informational-theoretic security without violating some widely accepted complexity assumption. Our works revealed a previously unknown feature of quantum channel usage compare to a classical one in the setting of quantum cloud computing. We are developing other client-server based protocol for distributed quantum computing.