Blockchain is the technology behind bitcoin and other crypto-currencies. According to Santander, it could save financial institutions $15-20bn a year from 2022 onward. Most experts see an unprecedented potential, but many banks, payment processors and credit card companies fret that bitcoin entrepreneurs could cast a pall over their core business. Whatever the position of blockchain, many voices are shouting from different angles, creating a cacophony of confusion including tech-evangelists, anarcho-libertarians, and industry experts. But while everybody in IT and banking seems to have an opinion on the blockchain, there is little systematic research, no strategic analysis. Blockchain Babel is the ultimate guide to the most disruptive technology to have entered the finance industry in recent years.