Yet Another Note on Block Withholding Attack on Bitcoin Mining Pools

In this paper we provide a short quantitative analysis of Bitcoin Block Withholding (BWH) Attack. In this study, we investigate the incentive earned by a miner who either independently or at the diktat of a separate mining pool launches Block Withholding attack on a target mining pool. The victim pool shares its earned revenue with the rogue attacker. We investigate the property revenue function of the attacker and find parameters that could maximize the gain of the attacker. We then propose a new concept that we call “special reward”. This special rewarding scheme is aimed at discouraging the attackers by granting additional incentive to a miner who actually finds a block. A BWH attacker who never submits a valid block to the pool will be deprived from this special reward and her gain will be less than her expectation. Depending upon the actual monetary value of the special reward a pool can significantly reduce the revenue of a BWH attacker and thus can even ward off the threat of an attack.

[1]  Adam Back,et al.  Hashcash - A Denial of Service Counter-Measure , 2002 .

[2]  Ittay Eyal,et al.  The Miner's Dilemma , 2015, 2015 IEEE Symposium on Security and Privacy.

[3]  Meni Rosenfeld,et al.  Analysis of Bitcoin Pooled Mining Reward Systems , 2011, ArXiv.

[4]  Prateek Saxena,et al.  On Power Splitting Games in Distributed Computation: The Case of Bitcoin Pooled Mining , 2015, 2015 IEEE 28th Computer Security Foundations Symposium.

[5]  Aron Laszka,et al.  When Bitcoin Mining Pools Run Dry - A Game-Theoretic Analysis of the Long-Term Impact of Attacks Between Mining Pools , 2015, Financial Cryptography Workshops.