Trust between entities in any scenario without a trusted third party is very difficult, and trust is exactly what blockchain aims to bring into the digital world with its basic features. Many applications are moving to blockchain adoption, enabling users to work in a trustworthy manner. The early generations of blockchain have a problem; they cannot share information with other blockchains. As more and more entities move their applications to the blockchain, they generate large volumes of data, and as applications have become more complex, sharing information between different blockchains has become a necessity. This has led to the research and development of interoperable solutions allowing blockchains to connect together. This paper discusses a few blockchain platforms that provide interoperable solutions, emphasising their ability to connect heterogeneous blockchains. It also discusses a case study scenario to illustrate the importance and benefits of using interoperable solutions. We also present a few topics that need to be solved in the realm of interoperability.

翻译：在任何缺乏可信第三方的场景中，实体间的信任极难建立，而信任正是区块链凭借其基本特性旨在为数字世界带来的核心价值。众多应用正逐步迁移至区块链平台，使用户能够在可信赖的环境中开展工作。早期区块链存在一个问题：它们无法与其他区块链共享信息。随着越来越多人将应用迁移至区块链，海量数据由此产生，且应用复杂度的提升使得不同区块链间的信息共享成为必然。这推动了互操作性解决方案的研究与开发，使区块链能够相互连接。本文讨论了几种提供互操作性解决方案的区块链平台，重点阐述其连接异构区块链的能力。同时，通过案例场景分析，说明了采用互操作性解决方案的重要性和优势。我们还提出了当前互操作性领域需要解决的一些关键议题。