Risk of double-spend 51% attacks at Bitcoin Blockchain Exchanges

A malicious miner successfully executed a double spend attack on the Bitcoin Gold network last week, making BTG at least the third altcoin to succu... (2018)

After losing money during a 51 percent attack earlier this year, crypto project Horizen claims to have a solution to crypto's famed vulnerability. (2018)

At least five cryptocurrencies have recently been hit with a 51% attack, a vulnerability users used to scoff at. (2018)

If a permissionless blockchain doesn’t have a large enough community of users, developers and miners, its vulnerable, writes Michael J. Casey. (2019)