Typically the custodians of large cryptocurrency holdings, exchanges have become a primary attack target for hackers. As such, exchanges have to balance user-convenience with security. And while exchanges do everything they can to minimize their attack surfaces, some attack vectors are beyond the exchanges’ control. One of these vectors is the cryptocurrency themselves and the exploitable blockchains they are built on.
Due to the fall in cryptocurrency prices after the 2017 bull market and the decrease in miner revenue, 51% attacks have become a more common occurrence on blockchain networks.
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