Which of these was the first secure retail transaction technology that enabled the growth of e-commerce in the early 1990s?

The retail landscape was forever changed by the invention of e-commerce, allowing consumers to shop from anywhere in the world. Behind this revolutionary technology advancement are pioneering individuals and companies who took the bold step to move retail into the digital realm. Test your knowledge about the early days of online shopping and the technological innovations that made it possible!

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SSL (Secure Sockets Layer) encryption, developed by Netscape in 1994
PayPal's original digital wallet system, developed in 1992
Amazon's patented 1-Click purchasing technology from 1991
IBM's Secure Electronic Transaction (SET) protocol from 1993