SCrypt is specifically designed to be hard to crack using FPGAs. To achieve this, it relies on high memory requirements for calculation of the hash. Crypto-mini

SCrypt is specifically designed to be hard to crack using FPGAs. To achieve this, it relies on high memory requirements for calculation of the hash. Crypto-mining boards for traditional cryptocurrencies have no memory requirements, and therefore cannot be repurposed to calculate SCrypt. However, with the advent of cryptocurrencies that also rely on memory-inefficient hash algorithms in order to prevent people from using classic FPGA clusters to mine them professionally, this is likely to change, as now there is monetary incentive to develop FPGA boards with high amounts of memory. The situation is still less bad though.