Learn how 51% attacks work in Proof of Work blockchains. We explain the mechanics of double spending, the role of hashrate rentals, and real-world examples like Bitcoin Gold and Verge.
A 51% attack lets bad actors reverse transactions and double-spend cryptocurrency by controlling most of a network's mining power. While Bitcoin is safe, smaller blockchains like Ethereum Classic have been hit. Learn how it works and how to protect yourself.
