SoK: Communication Across Distributed Ledgers

@inproceedings{Zamyatin2019SoKCA,
  title={SoK: Communication Across Distributed Ledgers},
  author={Alexei Zamyatin and Mustafa Al-Bassam and Dionysis Zindros and Eleftherios Kokoris-Kogias and Pedro A. Moreno-Sanchez and Aggelos Kiayias and William John Knottenbelt},
  booktitle={IACR Cryptol. ePrint Arch.},
  year={2019}
}
Communication across distributed systems, each running its own consensus, is a problem previously studied under the assumption of trust across systems. With the appearance of distributed ledgers or blockchains, numerous protocols have emerged, which attempt to achieve trustless communication between distrusting ledgers and participants. Cross-chain communication thereby plays a fundamental role in cryptocurrency exchanges, sharding, bootstrapping and extension of distributed ledgers… 
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