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Communications of the ACM

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The Research archive provides access to all Research articles published in past issues of Communications of the ACM.

July 2018


From Communications of the ACM

Majority Is Not Enough: Bitcoin Mining Is Vulnerable

Majority Is Not Enough

We propose a practical modification to the Bitcoin protocol that protects Bitcoin in the general case.


From Communications of the ACM

Technical Perspective: The Rewards of Selfish Mining

"Majority Is Not Enough: Bitcoin Mining Is Vulnerable," by Eyal and Sirer, questions the 2009 Bitcoin white paper's implicit assumption of perfect information—that all miners have the same view of the blockchain.