Quantum Bit Commitment with Application in Quantum Zero-Knowledge Proof (Extended Abstract)

Abstract

In this work, we study formalization and construction of non-interactive statistically binding quantum bit commitment scheme (QBC), as well as its application in quantum zero-knowledge (QZK) proof. We explore the fully quantum model, where both computation and communication could be quantum. While most of the proofs here are straightforward based on previous works, we have two technical contributions. First, we show how to use reversibility of quantum computation to construct non-interactive QBC. Second, we identify new issue caused by quantum binding in security analysis and give our idea to circumvent it, which may be found useful elsewhere.