In article <CAMm+LwgWLfZjs6p9q30dEk_EWHFREh8N_382NyU9DdyWgR9waQ@xxxxxxxxxxxxxx> you write: >> Blockchain technology has a place, ... >What is useful in Blockchain is the technology patented by Haber and >Stornetta in 1990. Yup, the timestamped ledger is indeed useful. The distributed consensus part is a technical tour de force but is a problem masquerading as a solution looking for a problem. In my experience the only practical use of blockchain is as pixie dust that people in big companies can sprinkle on otherwise boring but worthy database reenginering projects to get upper management to fund them. I suppose that's OK, but it's a rather narrow application. R's, John PS: They published an article on it in 1990. They got a patent in 1994 on a tweaked version but the basic technology has always been unencumbered. The patent expired in 2015 so the tweak is P.D. too.