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Title:
Unconditionally Secure Quantum Bit Commitment and Quantum Oblivious Transfer
Authors: Ping Wang, Yikang Lei, Yiting Su
Abstract:Recently, a novel secure quantum bit commitment (QBC) protocol has been proposed [29]. However, the protocol requires Alice and Bob to share Bell states in advance, making the protocol lacking in practicality. In this paper, we propose two new unconditionally secure quantum bit commitment protocols that do not require pre-shared Bell states based on entangled and non-entangled states, respectively. Their security stems from quantum mechanical properties such as quantum superposition, quantum entanglement, no-cloning theorem, and no-communication theorem. Furthermore, by combining the proposed QBC with Yao’s quantum oblivious transfer (QOT) model, we can obtain an unconditionally secure QOT protocol.
ePrint: https://eprint.iacr.org/2023/1928
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