Golden
Block Withholding Attack

Block Withholding Attack

An attack in which a miner on a pool intentionally does not submit any blocks to the pool in an effort to cause the profitability of the mining pool to drop.

A Block Withholding attack, also known as selfish mining, occurs when a miner on a pool intentionally does not submit any blocks they find to the pool. The intent of the attack is to cause the profitability of the mining pool to drop. This type of attack, if sustained for a long enough period, can bankrupt a pay-per-share pool. Mitigation of a Block Withholding attack is complex because of the random nature of mining, but some methods have been developed such as various cryptographic commitment schemes combined with hash functions. These schemes typically prevent the pool administrator from cheating on the entire pool and make it impossible for miners in the pool to distinguish between a partial proof of work and complete proof of work. 

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Analysis of Bitcoin Pooled Mining RewardSystems

Meni Rosenfeld

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