There are different kinds of blockchains, which have been applied in various
areas. Blockchains are relatively independent systems that are apt to form
isolated data islands. Then cross-chain interaction is proposed to connect
different blockchains. However, the current cross-chain methods do not maintain
the security of the original blockchain. They either depend on a less secure
third-party system or a less secure method. This makes the cross-chain
interaction less secure than the original blockchains (the security downgrade
issues), or the cross-chain interaction can be done even if the paired
blockchain does not exist (the blockchain invisible issue). In this paper, we
first propose a system interaction model and use it to analyze the possible
security issues. Based on conclusions got from the proposed model, we propose
the cross-chain method that verifies the data of the paired blockchain by the
consensus algorithm of the paired blockchain (the CIFuV method). With this
method, the cross-chain interaction can be as the same security as in the
paired blockchain. At last, we evaluate the security issues during the system
interaction process, and the possibility to have the CIFuV model on the public
blockchains.

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Author Of this post: <a href="http://arxiv.org/find/cs/1/au:+Su_H/0/1/0/all/0/1">Hong Su</a>

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