The decentralized, encrypted public ledger could have a wealth of applications in healthcare, a top security pro says. The downsides would include mistrust of the technology because of its potential performance problems, he says. These include streamlining the resolution of insurance claims, management of internet of things medical devices and providing granular privacy settings for personal medical data. Public vs private blockchains can have scaling problems particularly when its used for encryption, he adds. Private blockchain services from IBM, Amazon and Microsoft, give much better service levels.”]