International Association for Cryptologic Research

International Association
for Cryptologic Research

IACR News item: 15 June 2014

Iddo Bentov, Charles Lee, Alex Mizrahi, Meni Rosenfeld
ePrint Report ePrint Report
We propose a new protocol for a cryptocurrency, that builds upon the Bitcoin protocol by combining its Proof of Work component with a Proof of Stake type of system. Our Proof of Activity (PoA) protocol offers good security against possibly practical future attacks on Bitcoin, and has a relatively low penalty in terms of network communication and storage space. We explore various attack scenarios and suggest remedies to potential vulnerabilities of the PoA protocol, as well as evaluate the performance of its core subroutine.

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