Which cryptographic invention, discovered in the 1970s, made secure e-commerce possible by allowing encrypted transactions without sharing secret keys?

E-commerce has transformed retail shopping forever, but its history includes some fascinating inventions that made online shopping possible. This trivia question tests your knowledge about a key technological discovery that revolutionized how we shop online and fundamentally changed retail security. Do you know which invention made secure online transactions possible and helped e-commerce platforms flourish?

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Public-key cryptography (asymmetric encryption)
One-time pad encryption
Digital watermarking technology
Quantum encryption protocol