Which invention is widely credited as the first secure e-commerce transaction technology that led to widespread adoption of online shopping in the 1990s?

E-commerce has transformed how we shop and do business. Behind today's trillion-dollar industry are pioneering technologies, visionary entrepreneurs, and groundbreaking innovations that overcame significant technological and consumer trust barriers. Test your knowledge about the early days of online shopping that paved the way for the digital marketplace we know today.

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Secure Socket Layer (SSL) encryption
One-click purchasing patent
Digital shopping cart interface
Electronic Data Interchange (EDI) protocols