Cross chain bribery contracts: Majority vs mighty minority

Quang Tran, Lin Chen, Lei Xu, Yang Lu, Weidong Shi

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Bribery is a perilous issue in the real world, especially in an economical aspect. This fraudulence is unavoidable, and more importantly, it is more difficult to trace in case smart contracts are utilized for bribing on a distributed public blockchain. In our paper, we propose a new threat to the security of a blockchain system, cross-chain bribery using smart contracts. An arbitrary wealthy briber can utilize cross-chain smart contracts to manipulate a consensus mechanism on a victim’s blockchain or to disgrace a victim’s blockchain. To better understand this threat, our paper proposes a framework to analyze bribery using cross-chain smart contracts. We analyze the amount of incentive to bribe rational miners in a victim’s blockchain and also a full cost of conducting a cross-chain bribery attack. The result is that such attacks can be carried out with a reasonable amount of money or cryptocurrencies.

Original languageEnglish
Title of host publicationHighlights of Practical Applications of Survivable Agents and Multi-Agent Systems. The PAAMS Collection - International Workshops of PAAMS 2019, Proceedings
EditorsFernando De La Prieta, Alfonso González-Briones, Pawel Pawleski, Davide Calvaresi, Elena Del Val, Vicente Julian, Fernando Lopes, Eneko Osaba, Ramón Sánchez-Iborra
Number of pages13
ISBN (Print)9783030242985
StatePublished - 2019
Event17th International Conference on Practical Applications of Agents and Multi-Agent Systems, PAAMS 2019 - Ávila, Spain
Duration: Jun 26 2019Jun 28 2019

Publication series

NameCommunications in Computer and Information Science
ISSN (Print)1865-0929
ISSN (Electronic)1865-0937


Conference17th International Conference on Practical Applications of Agents and Multi-Agent Systems, PAAMS 2019


  • Blockchain
  • Cross-chain bribery contract
  • Rational miner
  • Security threat
  • Selfish mining
  • Smart contract


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