Abstract
Blockchain technology has gained widespread popularity across various industries due to its decentralized nature, immutability, and traceability. However, blockchain systems often operate in isolation because of differences in their block structures, consensus mechanisms, and permission models. Cross-chain technologies have emerged to address this interoperability challenge, enabling seamless communication between disparate blockchain networks.
While existing surveys on cross-chain technologies provide valuable insights, they struggle to keep pace with rapid advancements in the field. Additionally, there is a lack of standardized criteria to evaluate the quality of these technologies. This paper offers a thorough literature review by introducing a set of evaluation metrics covering security, privacy, performance, and functionality. We classify cutting-edge cross-chain solutions, assess their performance against our proposed criteria, and highlight unresolved challenges and future research directions.
Keywords
- Blockchain
- Blockchain interoperability
- Cross-chain technology
FAQs
1. What is blockchain interoperability?
Blockchain interoperability refers to the ability of different blockchain networks to exchange data and assets seamlessly, enabling collaboration across isolated systems.
2. Why are cross-chain technologies important?
They solve the "island effect" in blockchain ecosystems, allowing decentralized applications (dApps) to leverage multiple chains for enhanced scalability and functionality.
3. What are the key challenges in cross-chain development?
Security risks (e.g., relay chain attacks), privacy preservation, and maintaining high throughput without compromising decentralization are major hurdles.
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4. How do evaluation criteria help assess cross-chain projects?
Metrics like transaction speed, fault tolerance, and privacy compliance provide a standardized framework to compare technical maturity and real-world applicability.
5. What emerging trends should researchers watch?
Advances in zero-knowledge proofs (ZKPs) and modular blockchains are reshaping interoperability standards.
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