The first #public key cryptosystem appeared almost 40 years ago: in 1976. Thanks to Whitfield Diffie, @MartinHellman2 and Ralph Merkle!
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@CryptoNoteTech First practical algorithm (called Diffie-Hellman Key Exchange, but should include Merkle) was discovered ~May 1976.
@CryptoNoteTech Thanks for bringing back fond memories.
@CryptoNoteTech Merkle's idea may have been 40 years ago, but Whit's and mine was a bit later (and independent). See next msg too.