Blockchain is an emergent technology that

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may be as transformative as the internet, according to many predictions. But this innovative new technology has a surprising link to the days of medieval treasuries.

Blockchain is a distributed ledger that uses cryptography — mathematical code — to chain together records of transactions in a tamper-resistant and transparent manner. It is being used as an alternative or replacement for national currencies, contracts, internet device authentication and more.

This form of record-keeping, though technologically novel in the digital era, is not so new after all. Historian M.T. Clanchy tells us that it existed in the medieval era, during the transition from oral to written forms of memorialization. At that time, symbolic objects played a crucial role in providing evidence of transactions, rights and entitlements.

https://theconversation.com/how-blockchain-technology-has-medieval-roots-87138