Affiliation:
1. School of Data Science The Chinese University of Hong Kong Shenzhen, Longgang District Shenzhen 518172 China
2. International Quantum Academy (SIQA) Futian District Shenzhen 518048 China
3. Graduate School of Mathematics Nagoya University Chikusa‐ku Nagoya 464‐8602 Japan
Abstract
AbstractOblivious transfer is considered as a cryptographic primitive task for quantum information processing over a quantum network. It is an essential building block for secure multiparty computation. It is known that one‐server oblivious transfer is impossible. When the task is the transmission of classical messages, protocols for two‐server oblivious transfer exist, i.e., existing protocols work under the assumption that two servers do not communicate with each other. However, when the task is the transmission of a quantum state, no existing method works even under the above two‐server assumption. Two‐server oblivious transfer protocols for quantum messages are proposed for the first time.
Funder
National Natural Science Foundation of China