what was the first blockchain 
although david chaum first proposed a blockchain like protocol in his 1982 dissertation computer systems established maintained and trusted by mutually suspicious groups the first decentralized blockchain was conceptualized by satoshi nakamoto in 2008 the bottom lineecash was conceived by david chaum as an electronic cash system in 1982 in 1990 it was realized through his company digicash ecash was implemented as micropayment system at mark twain bank in saint louis missouri from 1995 to 1998 when the company filed fro bankruptcy the company along with its patents for ecash was sold off to ecash technologies 