Date Posted: 4/08/2015

Postdoctoral researcher Ittay Eyal is quoted in a Scientific American article, "Bitcoin-Based Blockchain Breaks Out".  Eyal, speaking about the security of prior transaction records in blockchains, notes that "To change history, an attacker needs more computation power than all honest parties combined.” The article also references work by Eyal and Gun Sirer on some existing problems with block-chain systems.