Cryptography in Olden Days

in hive-111825 •  3 years ago 

Did you Know? In olden days, one of the most common method for secret communication was to shave the messenger's head and write the message on the scalp. The messenger then has to wait for the hair to regrow for him to wander without fear of getting caught.

From there to today's Hash Functions used in Blockchains, we have come a long way.

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