When a party has more than 51% of the network hashrate and uses it for an attack like double-spend.
Bitmain’s bitcoin and cryptocurrency ASIC. Comes in various models
Antminer S9 Series
The legend. Released in 2016. One of the sturdiest, longest lasting bitcoin mining ASIC series on the market.
Antminer S17 Series
One of Bitmain’s less reliable Bitcoin mining ASIC series, released in 2018.
Antminer S19 Series
Bitmain’s latest generation of ASICs. Includes the S19, S19 pro, S19j pro, S19 XP, and S19 hydro.
Specialized hardware used to mine Bitcoin and other cryptocurrencies. The most common manufacturers are Bitmain, MicroBT, Canaan, Innosillicon, Ebang, and StrongU.
AsicBoost exploits the fact that Bitcoin block hashes are created from separate chunks of 64 bytes of data. Bitmain was accused of using it covertly at one point but now it is seen as the industry standard and an optimization.
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