Hashcash Proof-of-Work Proposed
Adam Back publishes a proposal for Hashcash, a proof-of-work algorithm designed to limit spam. It later serves as the core mechanism for Bitcoin.
Only one person can claim March 28, 1997 (Friday) in the Dateverse universe. It occupies chronological index position #17,254 in our 100-year timeline and was registered under Token ID #19970328.