A Cross-Chain Protocol based on Quantum Teleportation for Underlying Architecture of Metaverse

Abstract

In this era of technological change, metaverse has attracted extensive attention from all over the world as next-generation internet. Blockchain technology plays an indispensable role in realizing the independent digital identity and economic system which are the significant attributes of the metaverse. To achieve the cross-universe mechanism and reduce network resource consumption, this paper proposes a cross-chain protocol for the underlying architecture of metaverse that utilizes an identity information chain to guarantee the separate digital identity of users and decrease the data interaction between varied consortium blockchains. However, along with the rapid development of quantum computing, the classical cryptosystems which commonly count on mathematical complexity will not be reliable and secure. The current post-quantum cryptography technologies that increase the time complexity of algorithm will lead to quite low efficiency and high resource overhead while applying to blockchain structures. But quantum cryptography is capable of lifting both security and efficiency of blockchain. As a result, the scheme put forward in the article adopts quantum teleportation to implement secure communication. In addition, to assure the atomicity of cross-chain transactions that cross-chain asset exchanges succeed or fail simultaneously, a quantum time lock that improves the previous studies and combines quantum cryptography technology is proposed.